What is the area of the following circle?

16π units² or 50.24 units²

Step-by-step explanation:

The area of a circle can be found using the following formula.

a=πr²

We are given the diameter. We need to find the radius. The radius is half the diameter.

r=d/2

The diameter is 8 units. Substitute 8 in for d.

r=8/2

r=4

The radius is 4 units.

Now we know the radius, and can substitute it into the area formula.

a=πr²

r=4

a=π4²

Evaluate the exponent. 4² is the same as 4*4, which is equal to 16.

a=π16

a=16π

The area in terms of pi is: 16π units². If we want an exact answer, substitute 3.14 in for pi.

a=16*3.14

a=50.24

The area is: 50.24 units²

hi friend

here is your answer

there are two angles that are alternate interior angle with angle 9

the angle 15 and angle 7 are alternate interior angle with angle 9.

hope it is for you so mark my answer as a brainliest

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer