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

 Feb 12, 2021
 #1
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draw a rectangle around it and then find the area of the 3 triangles around the gray triangle, then subtract it from the big rectangle and you get 9

 Feb 12, 2021
 #2
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Thank you

 Feb 12, 2021
 #3
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No prob

 Feb 12, 2021

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