How do you know you know? Prove it! The guide goes through several examples and includes a link to a video to teach learners how to work through coordinate proofs. The goal is to prove that different shapes are indeed that shape. 

This is a proof problem, considered a "three star" geometry problem requiring knowledge of proofs and properties of circles.

[Free Registration/Login may be required to access all resource tools.] This study guide gives an overview of isometric view, orthographic view, cross-section, and nets.

Explains the basic concept of parallel lines in Geometry with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Click on the appropriate word to view a small graphic depicting the term, or click to the crossword puzzle version of thisinteractive glossary.

Explains the basic concept of perpendicular lines with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Provides a detailed definition of the Hinge Theorem with step-by-step instructions and methods for solving problems on your own.

Explains the basic concept of a rhombus with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Explains the basic concept of triangle inequalities with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Explains the basic concept of similar triangles with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Explains the basic concept of right triangles with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Explains the basic concept of isosceles triangles with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Explains the basic concept of equilateral triangles with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Explains the basic concept of congruent triangles with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Explains the basic concept of the Pythagorean Theorem with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Explains the basic concept of triangles with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Explains the basic concept of parallelograms with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Explains the basic concept of quadrangles (quadrilaterals} with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Explains the basic concept of intersecting lines and angles with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Explains the basic concept of inscribed shapes with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Explains the basic concept of chords with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Explains the basic concept of arcs, angles, and sectors with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Explains the basic concept of circles with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Explains the basic concept of the area of geometric shapes with step-by-step instructions and methods for solving specific problems on your own relating to this topic.