Basically total length of any two-dimensional circular surface. For centroid moments of inertia polar moments of inertia and radius of gyration click on one of the following shapes. This will automatically appear when you already input the value of radius diameter.
To find the perimeter of the quarter circle find the circumference of the whole circle divide by 4 and then add the radius twice.
3 If you know the area of the circle divide the result by p and find its square root to get the radius. It is also called a perimeter of a circle. C 2pA C 2 p A Here is a circle with an area of 1000 km2 1000 k m 2. Here we read the value of the radius and calculate the perimeter of the Circle using the below formula and then print the result on the console screen.