i) Click on "Next" button for step by step solution.[br]ii) If you required, click on "Previous" button for Previous step.[br]iii) If you want to do practice again and again, click on "Reset" button and click on "Next" button slowly. [br]iv) Slide the upper slider for congruency of triangles on parallelograms and keep in same position. v) At last click on check box of parallelograms ABCD and ABEF.[br]vi) Slide the slider of parallelograms for the concept of equal parallelograms.