Across
- 5. " ° "
- 6. "∆"
- 7. "rad"
- 9. "∡"
- 11. " ∢"
- 13. same shapes, not same size
- 14. "π"
- 15. equivalence of geometric shapes and size
Down
- 1. " |x-y| "
- 2. It is usually represented by the bar symbol "—"on top of the endpoints
- 3. " ∥ "
- 4. "⊥ "
- 8. " ⌢ "
- 10. formed by two rays
- 12. = 90°