Practice comparing shapes based on their number of sides, number of corners, and side-lengths. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

[Free Registration/Login Required] This flipchart provides a review of circle, rectangle, square, triangle, and hexagon and introduces trapezoid and rhombus. Students are asked to identify the number of sides and the number of corners of...

Measure the lengths and diagonals of three squares with a ruler. Look over your measurements and try to come up with a rule of thumb for estimating the length of a diagonal if you know the length of a side.