**Theorem**: A proposition (or problem) that has been proven, or is to be proven, using explicit assumptions.

Resources for this term:

Finding Equations of Parallel and Perpendicular Lines

Students identify parallel and perpendicular lines and find points of intersection and x- and y-intercepts by looking at the equations of the lines.

Applying Angle Theorems

Students solve problems using the measures of the interior and exterior angles of polygons, specifically pentagons.

Geometry Problems: Circles and Triangles

Students use the properties of circles and triangles to find the relative areas of shapes in a pattern and explore alternative approaches to tackling the problem.