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To get the area of an ellipse you need to get two radiuses one from the top down and the other from across. The formula is PI x R1 X R2 with these values sub into the formula R1 is the radius from the top down and R2 is the radius from across.

Area of a Square

Get the area of a square using one side..

Area of a Rectangle

Get the area of a rectangle using one si..

Area of a Parallelogram

Get the area of a parallelogram by using..

area of a circle with circumference

Calculate the area of a circle with no p..

area of a circle with diameter

Calculate the area of a circle with no p..

area of a circle using radius

Calculate the area of a circle with no p..

area of a triangle

Work out the area of a triangle with no ..

Perimeter of a Rectangle

Get the perimeter of a rectangle using u..