NCTM Classroom Resources
@NCTMResources

May 31  
Students rotate an equilateral triangle around a point, "rolling" it around a square. What is the length of the triangle's path? How could you use this lesson to engage all students in the mathematics? Reply using #NCTMResources. #iTeachMath #MTBoS bit.ly/2yRyEr0 pic.twitter.com/bhO98h0929

