Perimeter Formulas


Triangle

Equilateral Triangle Isosceles Triangle Scalene Triangle
Perimeter of an Equilateral Triangle Perimeter of an Isosceles Triangle Perimeter of a Scalene Triangle
Equilateral Triangle Isosceles Triangle Scalene Triangle

Square

Square

Perimeter of a Square Formula

Rectangle

Rectangle

Rectangle Formula

Rhombus

Rhombus

Rhombus Formula

Rhomboid

Rhomboid

P = 2 · (a + b)

Regular Polygon

Area of a Regular Polygon

Formula for Area of a Regular Polygon

n is the number of sides

Circle Perimeter

Perimeter of a Circle

Circumference of a Circle Formula

Circumference of a Circle Formula

Arc Length

Arc Length

Length of an Arc Formula





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