Pi x radius x radius
1/4 X Pi x diameter x diameter
?
The answer will depend on the shape that the circle is embedded in! There are different formulae for different shapes.
Circumference of a circle = 2*pi*radius or pi*diameter
Use the formulae for the area and circumference of a circle, replacing the symbol for the radius or the diameter with the known radius or diameter. As a reminder, the radius is 1/2 the diameter.Circumference = pi x diameter area = pi x radius squared
A semi-circle is a two dimensional figure so it can have area but NOT volume. To find the area of a semi-circle see the question below.
10001/999900
From the given information and using the appropriate formulae the area of the circle works out as 65*pi square units.
So area of a circle is pi*(radius^2), since tau = 2*pi, then you have pi = (2*pi/2), so (2*pi/2)*radius^2 = (tau/2)*radius^2
There are two main formulae for finding the circumference of a circle. * C=2 x pi x radius * C= pi x diameter
Circle area = pi*r 2 r= D/2 Circle area = pi*(D/2) 2 = (pi/4)*D 2
Area of a circle is calculated by A=2*p*r where A represents the circle's area and r is the radius of the circle.
semi means half A semi-circle is half a circle The formula for the area of a circle is A = (Π * r^2) Area of semi circle = (Π * r^2) ÷ 2