Chapter Contents

Important area formulas of 2D shapes
Important perimeter formulas of 2D shapes

List of Area and Perimeter Formulas of 2D Shapes

Chapter Contents

Important area formulas of 2D shapes
Important perimeter formulas of 2D shapes

Important area formulas of 2D shapes

Polygon	Area
Rectangle	l × b
Square	a × a = a²
Parallelogram	b × h
Rhombus	b × h or $\frac{1}{2} \times d_{1} \times d_{2}$
Trapezium	$\frac{1}{2} (a + b) \times h$
Triangle	$\frac{1}{2} \times b \times h$
Isosceles triangle	$\frac{b \sqrt{a^{2} - b^{2}}}{4}$
Equilateral triangle	$\frac{\sqrt{3}}{4} a^{2}$
Circle	πr²

Important perimeter formulas of 2D shapes

Polygon	Perimeter
Rectangle	2(l + b)
Square	4a
Parallelogram	2(a + b)
Rhombus	4a or $2 \sqrt{{d_{1}}^{2} + {d_{2}}^{2}}$
Trapezium	a + b + c + d
Triangle	a + b + c
Isosceles triangle	2a + b
Equilateral triangle	3a
Circle	Circumference = 2πr

Last updated on: 15-06-2024

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Coordinate Geometry

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List of Surface Area and Volume Formulas of 3D Shapes

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