Instructional Video3:28
Curated Video

How to Find the Perimeter

3rd - Higher Ed
This video explains how to find the perimeter of 2D shapes such as squares, rectangles, triangles and composite shapes. A range of practice questions are at the end of the video.
Instructional Video
Khan Academy

Khan Academy: Geometry: Ca Geometry: Area, Circumference, Volume

9th - 10th Standards
Demonstrates solutions to problems #31-35 of California Geometry released state test questions. Problems address understanding of perimeter, volume, surface area, area, and Pythagorean theorem. [10:53]
Instructional Video
Sophia Learning

Sophia: Square Practice Problems

9th - 10th
This video lesson demonstrates how to use the characteristics of a square to find angle measures and side lengths. [4:31]