To find the area of a semi circle, you use the formula for finding the area of a circle, which is $\pi$ $r^{2}$ , and then you divide that by 2 since it is half of a circle.

In this case, $\pi$ $(5)^{2}$ ≈ 78.54

$\frac{78.54}{2}$ = 39.27

8 0

3 years ago

Here is a list of numbers:

ANEK [815]

Answer:

4.5

Hope it helps

5 0

1 year ago

the center of a circle is on the line y=2x and the line x=1 is tangent to the circle at (1,6).find the center and the radius

Julli [10]

The radius and the center of the circle are 4 units and (1,2), respectively

<h3>How to determine the center and the radius?</h3>

The center of the circle is on

y = 2x and x = 1

Substitute x = 1 in y = 2x

y = 2 * 1

Evaluate

y = 2

This means that the center is

Center = (1, 2)

Also, we have the point of tangency to be:

(x, y) = (1, 6)

This point and the center have the same x-coordinate.

So, the distance between this point and the center is

d = 6 - 2

d = 4

This represents the radius

Hence, the radius and the center of the circle are 4 units and (1,2), respectively