area-and-perimeter-formulas-geometry-formulas

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Area and Perimeter formulas for common geometric 2D shapes

http://www.moomoomath.com/Geometry-Formulas.html

Transcript

Welcome to MooMooMath where we upload a new Math video everyday.

In this video I would like to talk about the area and perimeter formulas of common geometric shapes.

Area is the amount of space found inside the two dimensional shape.

The perimeter is the distance around the shape.

The formula helps you calculate the area and the perimeter. Let's start with a circle.

The area of a circle is equal to πr^2

The perimeter of a circle which is called the circumference is equal to 2 πr.

The area of a parallelogram is base x height

Remember the height must be perpendicular to the base

The perimeter of a parallelogram is equal to 2(b+h)

The area of a rectangle is base x height

The perimeter of a rectangle is 2(b+h)

You can find the area of a rhombus two ways.

If the height is given you can use base x height

If the height is not given you can use 1/2 diagonal1 x diagonal2

Area of a square is side2

The perimeter equals 4side

The area of a trapezoid equals ½ (b1 + b2)h

Perimeter equals b1 + b2 + s1 + s2

Area of a triangle = 1/2base x height

If height is not given you can use heron’s formula

Square root s(s-a)s(s-b)(s-c)

S = a+b+c/2

Perimeter equals a+b+c

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Tagged under: formulas,area formulas,perimeter formulas,circle,square,rectangle,parallelogram,trapezoid,rhombus,geometry

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