Area of Trapezium (Proof using Parallelogram)

Q1. In the activity above, how many trapeziums is used to form a parallelogram?

Q2. What is the area of the trapezium if the area of the parallelogram is 100 cm² ?

Q3. The above activity shows how two identical trapeziums can be arranged to form a parallelogram. Can you think of any other examples where two identical shapes are used to form another shape?