幫幫手............@@

-對頂角 (vertically opposite angles)
-同頂角 (angles at a point)
-直線上的鄰角 (adjacent angles)
-同位角 (corresponding angles)
-錯角 (alternate angles)
-同旁內角 (interior angles of the same side)
-同位角相等 (corresponding angles equal)
-錯角相等 (alternate angles equal)
-同旁內角互補 (interior angles supplementary)
-三角形內角和 (angle sum of triangle)
-三角形外角和 (sum of exterior angles of triangle)
-等腰三角形底角 (base angles, isosceles triangle)
-等角對邊相等 (opposite sides, equal angles)
-等腰三角形性質 (properties of isosceles triangle)
-等邊三角形性質 (properties of equilateral triangle)
-多邊形內角和 (angle sum of polygon)
-多邊形外角和 (sum of exterior angles of polygon)
-兩邊成比例且夾角相等 (ratio of 2 sides, included angle)
-三邊成比例 (3 sides proportional)
-相似三角形對應角 (corresponding angles, similar triangles)
-相似三角形對應邊 (corresponding sides, similar triangles)
-畢氏定理 (Pythagoras Theorem)
-畢氏定理逆定理 (Converse of Pythagoras Theorem)

-對頂角 (vertically opposite angles)
-同頂角 (angles at a point)
-直線上的鄰角 (adjacent angles)
-同位角 (corresponding angles)
-錯角 (alternate angles)
-同旁內角 (interior angles of the same side)
-同位角相等 (corresponding angles equal)
-錯角相等 (alternate angles equal)
-同旁內角互補 (interior angles supplementary)
-三角形內角和 (angle sum of triangle)
-三角形外角和 (sum of exterior angles of triangle)
-等腰三角形底角 (base angles, isosceles triangle)
-等角對邊相等 (opposite sides, equal angles)
-等腰三角形性質 (properties of isosceles triangle)
-等邊三角形性質 (properties of equilateral triangle)
-多邊形內角和 (angle sum of polygon)
-多邊形外角和 (sum of exterior angles of polygon)
-兩邊成比例且夾角相等 (ratio of 2 sides, included angle)
-三邊成比例 (3 sides proportional)
-相似三角形對應角 (corresponding angles, similar triangles)
-相似三角形對應邊 (corresponding sides, similar triangles)
-畢氏定理 (Pythagoras Theorem)
-畢氏定理逆定理 (Converse of Pythagoras Theorem)