Curated OER
Right Triangles
In this right triangles activity, 10th graders solve and complete 5 various types of problems. First, they solve each of the triangles shown and find the area of each triangle. Then, students find the perimeter and area of the regular...
CK-12 Foundation
Ck 12: Inscribed and Circumscribed Circles of Triangles
[Free Registration/Login Required] Students will move points on a circle to determine the relationships between the inscribed and circumscribed circles of triangles. Click 'Challenge Me' to answer practice questions.
Math Open Reference
Math Open Reference: The Incircle of a Triangle
Learn about the incircle of a triangle with this handy reference guide. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Curated OER
Mathwords: Inscribed Circles
Mathwords provides an explanation and a diagram of an inscribed circle. By clicking on any of the highlighted words, you will learn about related terms.