# Sum of the angles of a triangle

Students prove that the sum of the interior angles of a triangle is 180 degrees. Students are introduced to Geometer's Sketchpad through a demonstration then try their hand at proving the interior angle's measurement.

Concepts

Resource Details

7th - 8th
Subjects
21st Century Skills
3 more...
Resource Type
Lesson Plans
Instructional Strategy
Skills Practice
Technology
Ed Software