Perimeter is said to be the length of the boundary or the outline of a 2 dimensional shape. The perimeter of a circle and ellipse is called circumference.
Formulas for Different 2D Shapes
Rectangle
The parameter of the rectangle is twice the times of sum of length and width of rectangle.
P= 2(L + W)
Square
Parameter of the square is 4 times the length of a side.
P= 4a
Triangle
The perimeter of a triangle is the sum of the lengths of all the edges of the triangle.
P = a + b +c
Circle
Total length of the boundary of the circle is known circumference of the circle.
C = 2Ď€r
Where, r is the radius of the circle.
Quadrilateral
The parameter of any quadrilateral is given by:
P = a + b + c + d
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