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It is a symbolic equation which requires triangle = 21.
24
42 + 42 = 84
42 and 42
It is: 0.5*42*37.8 = 793.8 square units
13 + 42 = 55
It is: 38+4 = 42
28 + 42 = 70
a right triangle
7662
22
42
63 plus 47 plus 42 plus 21 is equal to 173.