Perimeter Puzzle

How to play Perimeter Puzzle

1. Find the distance around a rectangle from its side lengths.
2. Read the prompt carefully and choose an answer, or type into the answer field.
3. After checking, read the explanation. Use “Next round” to continue.
4. Complete ten rounds for a score out of 100. Restart creates a fresh session.

A worked example

Find the perimeter. Rectangle: 12 × 8

the answer is 40. Add all four sides, or double length plus width.

A useful way to practice

Choose a stable reference point before imagining a turn, reflection or route. Moving one step at a time often helps more than trying to picture the whole transformation at once.

What your result means

This is a recreational spatial activity. Results describe performance on this particular task, with this device and these rules. They are not a clinical assessment, IQ score or promise of improvements in daily life. Your best result and recent sessions stay in this browser; no account is required.