How is the area of a semicircle found?

a. take half the area of the whole circle.
b. use the area formula with r/2.
c. take half of the circumference.
d. divide the area of the whole circle by 4.

(A) Take half the area of the whole circle.

Step-by-step explanation:

A semi-circle is half of a circle, thus the area of circle is given by:'

Area of circle=, where r is the radius of the circle.

Since, A semi-circle is half of a circle, therefore area of the semi circle is also half of the circle, therefore

Area of semi circle=

Thus, the area of the semi circle can be found by taking half the area of the whole circle.

understand that i don't know the answers

will someone answer his question

12cm

the answer is d