Across
- 2. radians angle unit / "c"
- 6. represented by the symbol "||"
- 7. angles are equal to 90° / "⊥"
- 9. equals to 90°
- 11. infinite line / "↔"
- 12. formed by two rays / "∠"
- 13. line that start from a point / "→"
- 15. same shapes, not same size / "~"
Down
- 1. triangle shape / "Δ"
- 3. equivalence of geometric shapes and size
- 4. represented by the symbol "∡"
- 5. line from a point to a point / "-"
- 8. represented by the symbol "π"
- 10. represented by the symbol "°"
- 14. represented by the symbol "|x-y|"