Last year, I started my pre-calculus class off with geometry review. The first topic we tackled was finding missing angles in triangles. This set of notes was the perfect opportunity to pull out some of my favorite school supplies: colored pens and highlighters! The purpose of these notes was to review three key geometry concepts …

# Angles

I really liked this angle matching task that I ran across in Mathematics for the College Boards by Rich Barnett (Copyright 1967 AMSCO). If you follow this link, you can “borrow” the book for free as part of the Internet Archive’s Online Free Library. There was a bit of confusion when I posted this question …

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. This summer, I blogged about …

I love this clinometer activity for giving my trigonometry students extra practice finding missing angles and sides of right triangles. Plus, it answers the question of “When will we ever use this?” I printed a clinometer template off of VirtualMaths.org for them to use. I mistakenly assumed that they would be able to put together …

I created this finding missing angles of right triangles practice book for my trigonometry students to glue in their interactive notebooks. My students were a bit miffed that they had to just write these equations. They thought I should have given them a foldable for these! I did make them a practice book, though. These …

I gave this missing angles task to my Trigonometry students as part of our beginning of year algebra and geometry review. I had students find the missing angles in this diagram that I found online. Here’s a link the original source. Free Download of Missing Angles Task

I created this interactive notebook page to help illustrate the sum of angles in a triangle. Instead of just telling my students that the sum of the angles in a triangle is always 180 degrees (something I hope they remember from geometry!), I decided to have them cut out a triangle and illustrate it themselves. …

I created this complementary and supplementary angles notes page for my trigonometry students as part of our beginning of year review before jumping into the actual trig course content. We wrote the following notes in our trigonometry interactive notebooks. Full Disclosure: My students hated this notebook page. You may think hate is a strong word. …