This lesson unit is intended to help teachers assess how well students are able to use geometric properties to solve problems. In particular, the lesson will help you identify and help students who have the following difficulties: solving problems by determining the lengths of the sides in right triangles; and finding the measurements of shapes by decomposing complex shapes into simpler ones. The lesson unit will also help students to recognize that there may be different approaches to geometrical problems, and to understand the relative strengths and weaknesses of those approaches.

In this Khan Academy activity, students will find the measure of an angle in a circle given an inscribed angle.

In this Khan Academy activity, students are given an inscribed shape in a circle and find the length of a line segment, measure of an arc, or the measure of an angle.

This lesson unit is intended to help teachers assess how well students are able to use geometric properties to solve problems. In particular, it will help you identify and help students who have difficulty: decomposing complex shapes into simpler ones in order to solve a problem; bringing together several geometric concepts to solve a problem; and finding the relationship between radii of inscribed and circumscribed circles of right triangles.

Students will create a poster (1 each per student in the group) that explains a circle theorem or property. Student Groups will use a 360 degree camera to create a virtual museum where they use a photo overlay of their poster and an attached audio file to explain their theorem/property.

Proof that the sum of angles of a triangle equals 180 degrees using vertical angles and corresponding angles.

In this Khan Academy activity, students will solve different problems that involve the tangent of a circle.

Students will use the inscribed angle theorem to find the measures of unknown angles. Students will Prove relationships between inscribed angles and central angles.