Math Cheat Sheet 2D Shapes (Area Formulas)

A Education › Mathematics cheat sheet in English by Cheat

Basic maths formulas for area of 2D shapes

10,441 views 1,979 downloads 24 Nov 2020 History

Rectangle

A = l x w
A = Area
l = length
w = width (or base)

Square

A = l²
A = Area
l = length

Circle

A = π r²
A = Area
r = radius

Semi-C­ircle

A = 0.5 x (π x r2)
A = Area
r = radius

Pythag­ora­sTh­eorem

c² = b² + a²
c = √c²
c = hypotenuse
a = leg 1
a² = c² - b²
a = √a²
b = leg 2
b² = c² - a²
b = √b²

Triangle

A = h x b ÷ 2
A = Area
h = height
b = base

Comments (1)

Cheat 16:37 24 Nov 2020

I hope this cheat sheet is useful and if it is, don't hesitate to comment!

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