answersLogoWhite

0


Best Answer

Commit to memory

A = pi r^2

C = 2 pi r or pi d

NB 2r = d

This is elementary school maths.

Hence if d = 2r 8 , then r = 8/2 = 4

Hence

A = pi 4^2

A = 16 pi

pi is a constant at 3.141592....

A = 16*3.41592.... = 50.26554.... units^2

User Avatar

lenpollock

Lvl 16
1y ago
This answer is:
User Avatar
More answers
User Avatar

Wiki User

15y ago

the Formula for Area is Pi times the radius squared. In this case, it would be (pi)4^2= 50.26

This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What is the area of a circle with a diameter of 8?
Write your answer...
Submit
Still have questions?
magnify glass
imp