If you want to ask questions about the "following", then I suggest that you make sure that there is something that is following.
Radius = Diameter/2 Diameter = 2* Radius
If the radius is 42 meters, then you already know the radius.
divide diameter by 2
Area of any circle is: pi*radius*radius or pi*r^2
Radius is half of the diameter. So radius2 means rxr.
Radius = Diameter/2 Diameter = 2* Radius
area = radius * radius * Math.pi;
Calculating the radius of a semicircle depends on what information about the semicircle is given.
The formula for calculating the area of a circle in terms of the radius is A r2, where A represents the area and r is the radius of the circle, expressed in square units.
If the radius is 42 meters, then you already know the radius.
The equation for calculating the area of a circle is A r2, where A represents the area and r is the radius of the circle.
divide diameter by 2
Ï€*r2, where r is the radius of the circle.
Area = pi*[R2 - r2] where R is the outer radius and r the inner radius.
Area of any circle is: pi*radius*radius or pi*r^2
The formula for calculating the area of a circle is A r2, where A represents the area and r represents the radius of the circle.
The formula for calculating the inertia of a hoop is I MR2, where I is the inertia, M is the mass of the hoop, and R is the radius of the hoop.