Archive for the 'circle area' Category

What is another way to find the area of a circle?

I’m really stuck on my maths homework I need to find some ways to finding the area of a circle. Can somebody please help me!?
The area of a circle is pi*r^2, read as: pi-r-squared. Another way, is if you know the radius and circumference, the area of a circle is also equal to circumference [...]

How do i find the area of a circle using diameter ?

I know how to get it using the Radius; Area = π x r²
but how do i get the area of a circle
using the diameter? thankz.
divide the diameter by 2 to get the radius then use the original formula

Can you find the radius, diameter and circumference of a circle with an area of 64Pie cm2.?

Find the radius, diameter and circumference of a circle with an area of 64Pie cm2. Write your answers as decimals rounded to the nearest hundredth.
mmmmmmmmm…..Pie
but maybe you mean Pi

How do I solve this math problem finding the area of a circle?

Find the area of a circle whose diameter is 3.6 centimeters (cm). Use 3.14 for π  and round your answer to the nearest tenth of a square centimeter.
The area of a circle = pi*r^2

How do i find the area of a circle that is inside a square?

How do i find the area of a circle that is inside a square? I have been given one side of the square, that is all.
Also it would help to know how to measure the area outside of the circle, but still inside the square
to get the area of the circle use half the length [...]

What is the formula of the area of a circle for r in terms of A?

The area A of a circle is equal to Pie r^2 where r is the radius of the circle.
Write an equation for r in terms of A.
just rearrange the equation!
A = π x r^2. I won’t do all of your homework for you, but I will do the next step…
A / π [...]

Square inscribe in a Circle, square side length is 7. How do I find area of the circle?

The square area in 49, but I dont know how to find the area of the circle.
For a square inscribed in a circle, the diagonal is always the diameter.
So the diameter = 7sqrt(2)
Area of circle:
= (pi (7sqrt(2)^2)/4
= 49pi (2) /4
= 49pi/2
= 76.97

How do you find the area of a circle in terms of pi?

I know how u find the area I just need help with this. It says to find the area in terms of pi. Do you find the answer and leave pi or multiply ur answer by pi? Ie. A circle with a radius of 6in. Is the answer 36pi or 36*3.14?
to find the area of [...]

How do I work out the diameter of a circle when I’ve got the area?

I know that to get the area of a circle you do pi-R-squared (I think) but can’t figure out how to reverse it. Is it the square root of the area, divided by pi or divide the area by pi then find the square root of that?
In short, I need a hole with an [...]

What is the area of a triangle that has a 270 degree angle within a circle whose radius is 4 inches?

I know the area of a circle is pie*radius(squared), so what would be the area and if you could please tell me how you got the answer thanks
270 degrees is 3/4 of a circle. So the area would be 3/4 * pi * r^2
The area is 12pi.Hope this helped.