Question 1 (5 points) What's the area of a circle with diameter 18 units?
Question 1 options:

A)

81π units2

B)

π units2

C)

18π units2

D)

9π units2

Hey,

so first off we need to know our equation for the area of a circle;

A=πr2

So know we plug in what we already know,

sense the diamiter we can figure out the radius (half way across) by simply dividing 18 units by 2 which  is 9.

Now we have

A=π9²

That is your answer π9²

5104.38 inches

step-by-step explanation: