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A rectangular stained glass window is made up of identical triangular parts as pictured below.
36 inches
48 inches
What is the area of the shaded triangular section?

 

 Feb 5, 2020
 #1
avatar+109345 
+1

Note that the width of each rectangle   =  48 /  3  =   16 in

 

And the height of each rectangle  = 36 / 4  =  9 in

 

So.....the area of each of these rectangles  =   16  *  9   =   144 in^2

 

And the shaded area  is 1/2 of this =    72 in^2

 

 

cool cool cool

 Feb 5, 2020
 #2
avatar+21931 
+2

The entire window is  48 x 36 = 1728 in2

    made up of 24 triangles     each triangle (which is shaded region) =   1728/24 = 72 in^2

 Feb 5, 2020

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