Question

A circle has a diameter of 14cm. what is the area of the circle, rounded to the rearest tenth?

Answer 1

To find the area of a circle.

We first need the radius.

This is quite simple, the radius is half of the diameter
Knowing the diameter is 14
14 divided by 2 = 7.

Now for a circle here is the equation
A = Area

A = π r ^2

So we have the radius being 7 but now it needs to be squared.

7 x 7 = 49.

So now our equation is.

A = π 49 ^2         (Keep in mind ^2 is just squared)

Now this is the answer but we can get more technical by multiplying 49 times π

Now π equals roughly 3.14 

So we can do 49 x 3.14 cm
Which this equals 153.86

Which rounding to the nearest tenth gets you:

153.9 cm is your area 

I really do hope this helps!
Brainliest is always appreciated if you feel its deserved!

P.S. If you still struggle with this here is a link that helped me out a lot with this subject when i was learning it :))

https://www.khanacademy.org/math/basic-geo/basic-geo-area-and-perimeter/area-circumference-circle/v/...





 

Answer 2

153.9 is the answer