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Calculate the surfaces of these figures

HeyxJacq  Mar 20, 2018
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 #1
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If by surfaces you mean area, here you go:

 

For the first shape, the area is:

 

17 * 15 which is 255.

 

For the second shape, we first need to find the height. 

 

To find the height we can use the Pythagorean theorem. 

 

5^2 - 3^2 = x^2 —————>  x = 4.

 

The area is 5 *4 ÷ 2 which also is 10.

 

The area for the third shape is:

 

17 *18÷2 which is 153.

 

To find the area for the final shape, we also need to find the height using the Pythagorean theorem. 

 

13^2 - 5^2 = x^2 ——————> x = 12

 

7*12 = 84. 

 

The area of the shapes in order is:

 

225, 10, 153, and 84.

supermanaccz  Mar 20, 2018
 #2
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I hope this helped :)

supermanaccz  Mar 20, 2018

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