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In square units, what is the area of the gray triangle?

 

 Jun 8, 2022
 #1
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Let's add triangles to make a square

 

 

This is a 5*5 square, so the area is 25sq un

 

The combined area of all the triangles around the grey triangle is 17 sq un

 

25-17

 

The grey triangle: 8 sq un

 Jun 8, 2022

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