Click in any shape in order to watch a video or more information on the shape
Circle
Parallelogram
Rectangle
Rhombus
Sector Arc
Trapezoid
Triangle
Equilateral Triangle
Square
Plane Shape
Formulas
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s
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Circumference = 2πradius
The perimeter of a circle is called circumference
Perimeter
Square
Circumference Circle
The perimeter of a plane shape is the total distance around the plane shape. The formulas for finding the perimeter of common plane shapes are found below along with video tutorials that work example perimeter problems.