Question

1.Why is the formula for finding the area of a rectangle related 2 d formula for finding area of
parallelogram ?
2.Explain why a rectangle is a parallelogram ,but parallelogram may not b a rectangle?

Answer 1

1.Because rectangle is a parallelogram too. 

2. Because Parallelogram has two pairs of equal parallel sides which a rectangle also has. Rectangle is special parallelogram in which the angles are 90 degree.