Rectangle riddle
Ages 9–12
You are told a rectangle's area and the distance around it. Neither on its own says what shape it is — but together they fix the two sides. Find them.
How big are the sides?
How many riddles?
It covers 24 square units, and the edge around it is 20.
width 1
height 1
Area is now 1
Edge is now 4
Every rectangle found
On paper too — Area & perimeter puzzles