Geometry Activities Collection
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This collection of free middle school and high school geometry activities are sure to bring an element of hands-on learning and fun to your classroom!
I highly suggest using the table of contents below to find resources for the topic you are currently teaching.
Below, you will find printable geometry posters, hands-on geometry activities, printable geometry notes, and logic puzzles that require geometric knowledge in order to solve.
I hope you find these free resources for teaching geometry to be a source of inspiration.
Geometry Basics
Geometry Vocabulary
Geometry Concentration Matching Activity
I attended a geometry teaching workshop once where the presenter had us play the game of concentration to practice various geometry terms.
I think this would make an awesome review of beginning of year geometry terminology such as point, line, plane, ray, etc.
I sadly don’t have a printable version to share, but it should be semi-easy to type up two sets of cards with pictures/symbols and terms or definitions.
Angles
Angle Mazes
These Angle Maze Puzzles from Naoki Inaba challenge students to find a path through a maze by being able to recognize common angle measurements.
Draw a path through the maze from S to G. Each time you pass through a numbered circle, the path must form that angle in degrees.
Complementary and Supplementary Angles Notes
These complementary and supplementary angle notes feature a memory trick for memorizing the difference between complementary and supplementary.
Missing Angle Notes
This set of notes on missing angles in triangles is the perfect opportunity to pull out some of my favorite school supplies: colored pens and highlighters!
Missing Angles Task
This missing angles task makes a great class warm-up!
Angle Matching Task
I found this angle matching task from a 1967 textbook to be very thought-provoking.
Reasoning and Proofs
Conditional Statements
If…Then Statements Geometry Poster Project
Looking for a fun way to have your geometry students practice writing conditional statements? Check out this If Then Statements Geometry Poster Project.
Proofs
Proof Matching Activities
I attended a workshop once where the geometric proofs were turned into matching activities with strips of paper for students to manipulate.
I thought this was brilliant! I don’t have a printable version of this, but it shouldn’t be too hard to take a worksheet you already have and restructure it like this.
Parallel and Perpendicular Lines
Parallel Lines Cut by a Transversal
Parallel Lines Cut by a Transversal Foldable
I used this parallel lines cut by a transversal foldable to review some crucial angle facts with my students.
Coordinate Geometry
Distance Between Two Points
Pythagorean Theorem and Distance Formula Notes
This two-page set of notes has students compare two methods of finding the distance between two points on the coordinate plane: the pythagorean theorem and the distance formula.
Pythagorean Theorem Notes
Here is a collection of notes I put together from various sources about using the pythagorean theorem when I taught this topic for the first time.
Distance Between Two Points Practice Book
This practice book features problems on finding the distance between two points on the coordinate plane.
Super easy for students to glue in their math notebooks!
Transformations
Coming Soon!
Triangles
Identifying and Classifying Triangles
Triangular Turkey Puzzle
This triangular turkey puzzle is such a great conversation starter. How many different triangles can you find in this picture of a turkey?
This warm-up always leads to healthy disagreements and math debates!
Classifying Triangles by Angles and Sides Notes
These notes feature separate charts for classifying triangles by angles and classifying triangles by sides.
I have students write specific notes about exactly what makes right triangles, obtuse triangles, acute triangles, scalene triangles, isosceles triangles, and equilateral triangles.
Angles Within Triangles
Illustrating the Sum of Angles in a Triangle
Here’s a hands-on way to illustrate to students that the sum of interior angles in a triangle is always 180 degrees.
Area of Triangles
Sankaku Area of Triangle Puzzles
Sankaku puzzles are a geometric based logic puzzle that focuses on finding the area of a triangle. The goal of each puzzle is to connect three dots to form a triangle with the specified area.
Equilateral Triangles
Equilateral Triangle Puzzle
This equilateral triangle puzzle would make a great warm-up or brain break during your unit on triangles!
Can you assemble the pieces to form an equilateral triangle where no two pieces of the same color touch – not even at a corner.
Parts of a Whole Equilateral Triangle Puzzle
The Parts of a Whole Puzzle gives students five shapes that must be arranged to form a triangle whose three sides are of equal length. In other words, form an equilateral triangle.
Pythagorean Theorem
Pythagorean Theorem Poster
This pythagorean theorem poster is meant to be printed on 11 x 17 cardstock.
Make it Pythagorean Puzzles
Looking for a challenge? Check out this page of Make It Pythagorean Puzzles.
Insert the same digit (in any manner of your choosing) to each side of the triangle to form a right triangle.
Pythagorean Theorem and Distance Formula Notes
This two-page set of notes has students compare two methods of finding the distance between two points on the coordinate plane: the pythagorean theorem and the distance formula.
Romeo and Juliet Pythagorean Theorem Questions
These pythagorean theorem questions all have a unifying theme – they involve Romeo and Juliet.
Wheel of Theodorus Art Projects
These Wheel of Theodorus Projects make a great end-of-unit task for the Pythagorean Theorem.
Pythagorean Triple Posters
I was surprised at just how frequently my students referenced these pythagorean triple posters that I created for my classroom!
Pythagorean Triples Interactive Notebook Page
I decided my students needed a Pythagorean Triples reference page in their notebooks to go along with the posters I have hanging in my classroom.
Special Right Triangles
Special Right Triangle Posters
These special right triangle posters are designed to be printed on 11 x 17 cardstock.
Special Right Triangles Discovery Activity
I created this special right triangle discovery activity to help students discover the patterns in the sides of the 30-60-90 and 45-45-90 special right triangles.
Special Right Triangles Dragon Puzzle
I found this dragon puzzle to practice special right triangles online, and I fell in love with it. Each of the triangles is a special right triangle.
One Big Square Task
I love using this One Big Square Task to review 45-45-90 special right triangles.
I enjoy listening to the conversations my students had as they struggled through this problem. And, I mean “struggle” in the best possible way!
Special Right Triangles Practice Book
This special right triangles practice book is easy to assemble and can be glued right in your students’ math notebooks.
Right Triangle Trigonometry
SOH CAH TOA Posters
I like to hang up these SOH CAH TOA posters to remind students of this mnemonic device for remembering the formulas for sine, cosine, and tangent.
Right Triangle Trig Formula Sheet
Get the help you or your students need remembering all of the formulas needed for right triangle trigonometry problems with this handy right triangle trig formula sheet.
Parts of a Right Triangle Poster
This parts of a right triangle poster helps emphasize the vocabulary words for adjacent, opposite, and hypotenuse before jumping into right triangle trig.
Parts of a Right Triangle Notes
I created this parts of a right triangle interactive notebook page to start off our unit on right triangle trigonometry.
SOH CAH TOA Foldable
This foldable helps students organize their notes on finding sine, cosine, and tangent.
Trig Function Posters
These trig function posters are designed to print on 11×17 cardstock.
SOH CAH TOA Notes
These notes go over both the parts of a right triangle how to find the trigonometric functions of an angle, given a triangle.
Missing Angles of Right Triangles Practice Book
These practice problems introduce students to inverse trig functions and how they can be used to solve for missing angles in a right triangle.
Gettin’ Triggy Wit It Music Video
Do your students need help remembering their trig formulas as well as how to find missing sides of right triangles? Check out this incredibly well-made YouTube video from Westerville South High School.
Clinometer Activity and Foldable
Help students to see the real-world applications of trigonometry by having them build a clinometer and use it (in addition to some right triangle trig) to find the height of a tall object.
Quadrilaterals and Other Polygons
Identifying Quadrilaterals and Polygons
Polygon Art Project
Looking for a fun polygon art project for your geometry class to complete? Look no further than this Picasso Polygon Portrait project.
Zukei Puzzles
Zukei puzzles are the brilliant creation of Naoki Inaba. Can you connect the dots on each grid to form the specified type of quadrilateral?
Count the Quadrilaterals Puzzles
I think these count the quadrilaterals puzzles from 100 Geometric Games by Pierre Berloquin could spark some great classroom conversation.
Shape Grid Puzzle
The goal of the shape grid puzzle is to divide the grid into various polygons and quadrilaterals.
Any lines you draw must follow either the grid lines or the diagonals of the grid squares.
Each shape that you draw must contain exactly one corresponding shape icon inside.
Angles of Polygons
Add Em Up Angles in Polygons Activity
Test your geometry students’ knowledge of finding angles in polygons with this fun add em up activity.
Squares
Square the Shapes Puzzle
I love this Square the Shapes Puzzle because it’s got some hidden mathematics involved in solving it that may not be obvious at first glance.
Let’s Make Squares Activity
This team-building activity requires students to work together to build various numbers of squares.
It’s trickier than it looks, and it’s a great community building activity.
Similarity
Similar Figures
Similar Figures Shadow Task
This shadow task involves similar triangles. I found the answer to be very unexpected!
Circles
Circumference
Hands-On Circumference Activity
This lesson uses yarn to give your students a hands-on experience with circumference.
Constructions
Hands-On Archaeology Geometry Activity
I attended a math teaching workshop where we did a hands-on activity that involved taking a chunk of a plate that we had excavated and performing geometric constructions on it to determine the original plate’s size.
Very interesting and hands-on!
Perimeter, Area, and Volume
Area
Area vs Perimeter Posters
Illustrate the difference between area and perimeter with these free printable posters.
Shikaku Area Puzzles
Shikaku Puzzles are a geometric-based logic puzzle from Japan that make a great warm-up when studying area.
The goal of a shikaku puzzle is to subdivide the grid into rectangles (and squares) so that the number in each rectangle refers to the area of that rectangle.
Area Maze Puzzles
Area Maze Puzzles from prolific Japanese puzzle creator Naoki Inaba have become quite popular in the United States.
Use your knowledge of area to find the missing information in each diagram.
Sankaku Area of Triangle Puzzles
Sankaku puzzles are a geometric based logic puzzle that focuses on finding the area of a triangle. The goal of each puzzle is to connect three dots to form a triangle with the specified area.
Area of Tangram Pieces Task
When I was completing my masters in curriculum and instruction, I was introduced to this excellent task that involves finding the area of various tangram pieces.
Perimeter
Area vs Perimeter Posters
Illustrate the difference between area and perimeter with these free printable posters.
Perimeter Puzzles
In this collection of perimeter puzzles, your challenge is to break the square grid into sections of various perimeters that match the numbers in the grid.
3D Shapes
Vocabulary of 3D Shapes
Build It Activity
Build It is a cooperative, team building activity that encourages students to work together, communicate, and think logically as they construct a geometric object to satisfy a set of given clues.
If you’re looking to work on vocabulary, this activity introduces/reinforces words such as “face” and “edge.”
Illustrating 3D Figures
3D Perspective Drawing
Shaun Carter shares a lesson on 3D perspective drawing.
Icosahedrons
Stellated Icosahedron Straw Art
If you have clear straws and curling ribbon, you can build these stellated icosahedrons. A fun end of year project!
Or, be like me and just make a set to hang from the ceiling in your classroom as a math-y decoration.
Miscellaneous Geometry Resources
Geometry Jokes and Puns
Bring some humor to your classroom with this collection of the best geometry jokes and puns. These jokes are sure to add a spark of fun to your geometry lesson and give your students a good laugh (or at least a groan at your cheesy math jokes.)
Geometry Word Search Puzzle
Here’s a fun math themed word search to enjoy that features vocabulary from high school geometry class.
