Rachel
About
Khan Academy on a Stick
Area of shaded region made from equilateral triangles
Perimeter and area of triangles
Perimeter and Area Basics
Triangle Area Proofs
Interesting Perimeter and Area Problems
Area of Diagonal Generated Triangles of Rectangle are Equal
Area of an equilateral triangle
Area of shaded region made from equilateral triangles
Challenging Perimeter Problem
Your browser does not support video. Please get the latest version of Google Chrome, Firefox, IE, or Safari. Alternately, you can try the link below if you have VLC or another media player installed.
If the above player doesn't work, you can
try this direct link
.