Need help to find the area of the semicircle

As the area of a circle is πr2. So, the area of a semicircle is 1/2(πr2 ), where r is the radius.

Step-by-step explanation:

As the area of a circle is πr2. So, the area of a semicircle is 1/2(πr2 ), where r is the radius.

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).