Area is 4.6 m2
in place of r (radius) write d/2 where d is diameter
You have answered this question for yourself; the answer is '10' Do you mean to ask ; What is the circumference/area of a circle, with a diameter of '10'?. If so , commit to memory ' elementary school maths. A = pi r^2 C = 2 pi r or pi d . From this 2r = d Hence 2r = 10 r = 5 C = 10 pi = 31.41592.... units A = pi 5^2 = 25 pi = 78.5398... units^2
force over area=pressure
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
To find the area of a box, you need to calculate the total surface area of all its faces. A box has six faces, each with its own area. To find the total area, you would add up the areas of each face. The formula for the surface area of a box is 2lw + 2lh + 2wh, where l is the length, w is the width, and h is the height of the box.
Divide the area by Pi to get the diameter.
pi is a constant = 3.141592654 . . . . circle area = pi * ( ( diameter/2 )2 )
The base of a cone is a circle. The area of a circle is found by multiplying the diameter by Pi.
Using the Circumference And Area.
To calculate this you will need the diameter of the circle. The formula is: diameter/2*pi If you don't know the diameter you can also use the area of the circle: Sqrt(Area/pi) = radius
Area= Pi r squared
Take out the diameter of the outer circle from the distance between the two. Gives you the diameter of the inner circle then pi r squared it.
If by "it" you mean a circle, once you know the diameter, you can calculate its radius, its circumference, and its area.
Area is 4.6 m2
Use the diameter and divide it by two.
Calculate the radius, which is simply 1/2 the diameter. Then use the standard formula for the area of a circle. ________________________________________________________________ The circle area = (pi) x diameter / 4 = 3.14 x 25/4 = 19.625 Sq inch
if you have the diameter or the arc, then you can divide the diameter by two, or you can use the arc to calculate it.