Math A

Reference Table for Areas

 

"(The universe) is written in the language of mathematics, and its characters are triangles, circles, and other geometric figures, without which it is impossible to understand a single word of it; without these, one is wandering about in a dark labyrinth."

Galileo (1564-1642)

   

Remember to label areas with "square" units.

 Area (triangle)

 Area (equilateral triangle)

or

 Area (rectangle)

or

 Area (rectangle) = (length)(width)

 

 Area (square)

 Area (parallelogram) 

 Area (trapezoid) 

d1=diagonal 1
d2= diagonal 2

 Area (rhombus)

or

 

 Area (circle)

              

Area (regular polygon)

 

Regular polygons have all sides of equal length.

a = apothem
p = perimeter

 

 

 

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Roberts