Maths challenge.net: Circumscribed Triangle

Put on your thinking caps because middle school math has never been more interesting in this huge resource full of thought provoking questions. Written as a newsletter, the resource has 10 two-page newsletters with a variety of...

A geometry proof problem involving a right triangle and finding angles of equal measure.

Find the area of this triangle in a coordinate plane.

Use your triangle solving skills to solve this triangle problem and then apply it to the real world.

While the lesson focuses on right triangles, this activity offers a great way to practice the area of all triangles through an interactive webpage. The activity begins with the class taking a square paper and cutting in in half; can they...

Use your right triangle solving skills to solve this ladders in a hole problem.

This is a "three star" geometry problem where prior knowledge of probability is required to solve this "Tick Tock Triangle" problem, have fun!

A geometry problem for students to use their mathematical reasoning skills to explain a right triangle property.

This is a "three star" geometry problem where prior math problem skills and proof experience is recommended to solve this "Perpendicular Construction" problem.

Observe the change in the trigonometric ratios as angles vary. An interactive provides the values of trigonometric ratios for both acute angles in a right triangle. Pupils create a right triangle to match given criteria and find the...