Across
- 2. the answer to addition
- 4. the answer to multiplication
- 6. polygon with four equal sides
- 7. the answer to subtraction
- 9. polygon with three sides
Down
- 1. distance around a shape
- 3. angle less than ninety degrees
- 5. an angle more than 90° but less than 180°
- 8. a 90° angle
- 10. the interior space of a shape