These reflected rectangles are example of congruent shapes ... EF ÷ BC = 6 ÷ 3 = 2. The sides DE and DF are three times the size AB and AC. DF ÷ AC = 12 ÷ 4 = 3. This means triangles ABC ...

Two congruent angles are simply pairs of angles with equal measures ... With both parallel lines cut, the adjacent angles and corresponding sides will share the same shape created by the line ...