Question

(PLZ HELP ASAP) The diagram shows one way to develop the formula for the area of a circle. Pieces of a circle with radius r are rearranged to create a shape that resembles a parallelogram. Since the circumference of the circle can be represented by 2πr, and the area of a parallelogram is determined using A = bh, which represents the approximate area of the parallelogram-like figure?

Answer 1

If u cant see it here's the answer, the first numbers are in a fraction 1/2 (2πr)(r) so its C

Answer 2

The sides of the parallelogram are labelled $a$ and $b$. The total length of the two longer sides is equal to the circumference of the circle. 

The circumference of the circle is given as $2 \pi r$, then the length of $a$ equals to $\frac{1}{2}(2 \pi r)$.

The side $b$ equals to the radius of the circle, $r$.

The area of the parallelogram is then given as $( \frac{1}{2}(2 \pi r)(r)$ which is the third option.