Practice finding the perimeter of rectangles and polygons. Perimeter is the distance all the way around a shape.
Add up all the sides, or use P = 2 × (length + width). A rectangle 8 by 5 has a perimeter of 2 × (8 + 5) = 26 units.
Perimeter is the total distance around the outside of a 2D shape — the sum of all its side lengths.
Cubles kits are geometry in your hands: nets, faces, edges and vertices that fold and click into a poseable 3D character. No scissors, no glue, about 15 minutes.
