Area of a rectangle, square & triangle

 

Area of a rectangle:

 

 

Image: scienceray.com

 

Area of a rectangle  ( A ) =  Length ( l )  ×  width ( w )

A  =  l  ×  w

 

Formula:       A =  lw

 

 

Area of a square:

 

Image: ehow.com

 

Area of a square ( A ) =  length ( l ) × width ( l )

A =  l  ×  l

 

Formula :   A  =  l²

 

 

Area of a triangle:

 

Image: squidoo.com

 

Area of a triangle  ( A )  =  ½  ×  base length ( b )  ×  height  ( h )

A =  ½ ×  b  ×  h

 

Formula:    A  =  ½bh

 

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