Learners build connections between algebra and geometry as they study equation solving. The ninth instructional activity in the series of 28 asks pupils to write equations using angle relationships. After writing equations to model...

Geometry is full of shapes, figures, and corresponding things here and there. The guide shares all of the key pieces of geometric information in a nicely color-coded and labeled sheet. 

How do you solve for an unknown angle? In this sixth installment of a 36-part series, young mathematicians use concepts learned in middle school geometry to set up and solve linear equations to find angle measures.

Why was the obtuse angle upset? Because it was never right! A valuable resource is loaded with background information on types of angles and lines. Learners review the characteristics of parallel, perpendicular, and...

Don't be obtuse, this geometry unit is the just the right resource for educating the acute young minds in your class. From classifying and measuring angles, to determining the congruence of shapes, this...

Soccer is all about angles. Young mathematicians use an interactive to correctly position the path of a soccer ball so that it reaches the goal. They consider complementary angles when answering a set of challenge questions.

Discover trigonometric ratios that complement each other. Using two videos, the lesson introduces the trigonometric ratios. The class discovers the relationship between the sine and cosine of complementary angles.

Start the exploration of trigonometry off right! Pupils build on their understanding of similarity in this lesson that introduces the three trigonometric ratios. They first learn to identify opposite and adjacent...

What does geometry have to do with depression? It's an angle of course! Learners apply the tangent ratio to problem solving questions by finding missing lengths. Problems include angles of elevation and angles of depression. Pupils make...

This is a mid-module assessment for the 16th lesson in 29 geometry lessons. Individuals demonstrate their understanding of concepts such as vertical and adjacent angles, constructing geometric figures, and triangle congruence criteria.

[Free Registration/Login Required] Students explore the concept of vertical angles by navigating through the interactive learning module and then answering questions that go along with the module.

Practice using knowledge of vertical, complementary, and supplementary angles to find a missing angle. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice setting up algebraic equations to solve unknown angle problems. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice identifying supplementary, complementary, and vertical angles.

Practice problems finding missing angles.

Practice finding complementary and supplementary angles.

Practice finding angle measures between intersecting lines.

Practice creating equations to solve for missing angles.

In this exercise, students practice identifying complementary and supplementary angles. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.