Question

Below is the justification for the formula for area of a circle. Which word,

Answer 1

Answer:

D. Sum

Step-by-step explanation:

The figure on the right shows the sum of all the parts of the figure on the right.

Answer 2

Answer:

A. product.

Step-by-step explanation:

The image shows a circle which is transformed into a parallelogram, you can see that the base is formed by sectors of the circumference, meaning that both areas are the same.

Basically, the area of the parallelogram is the product between the base and the height, so the area is $\pi r^{2}$, because it's formed with the parts of the circle.

Therefore, the correct answer is A.