area of regular polygons?

Mathematics
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Numbers 21-23

if you can help me please do!! i don't get those three at all.

Feb 6th, 2015

21.

Diagonal =12

Side of the square = 12/sqrt(2)

Area of the square = 144/2 =72

22.

Hypotenuse is opposite to 900

Side opposite to 600  is 8√3

The ratio is  √3 : 2

Hypotenuse = 8*2 =16

Area of one equilateral triangle √3/4 * 162 = √3*256

Area of hexagon = √3 *256*6 = √3*156

23.

6√3 is the radius = equal to side

Area of one equilateral triangle = √3/4 * 36*3 = √3*27

Area of hexagon = √3*27*6 = √3*162 


Feb 6th, 2015

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