✔ 最佳答案
1. Angle sum of triangle = ∠sum of Δ
2. Exterior angle of triangle = ext. ∠ of Δ
3. Pythagoras' theorem = Pyth. theorem
4. Converse of Pythagoras' theorem = Converse of Pyth. theorem
5. Angle sum of polygon = ∠sum of polygon
6. Sum of exterior angles of polygon = sum of ext. ∠s of polygon
7. Angles at a point = ∠s at a pt.
8. Vertically opposite angles = vert. opp. ∠s
9. Adjacent angles on a straight line = adj. ∠s on st. line
10. Corresponding angles
11. Alternate angles
12. Interior angles on the same side
13. Corresponding angles = corr. ∠s, AB//CD
14. Alternate angles = alt. ∠s, AB//CD
15. Interior angles on the same side = int. ∠s, AB//CD
16. Base angles of an isosceles triangle = base ∠s, isos. Δ
17. Equiangular
18. Nature of isosceles triangle
19. Nature of equilateral triangle
20. Correspomding sides of congruent triangle
21. Corresponding angles of congruent triangle
22. Corresponding sides of simular triangle
23. Corresponding angles of simular triangle
24. Three sides proportional = 3 sides proportional
25. Ratio of two sides included angles = ratio of 2 sides, inc. ∠
26. Angle bisector
27. Perpendicular bisector
28. Median
29. Altitude
30. Common sides
31. Common angles