3*3=9 9 is the answer.
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Triangle = sum of its 3 sides Square = sum of its 4 sides Rectangle = sum of its 4 sides
32 + 42 = 9 + 16 = 25
Sum = 3 x centre
25= 5*5 = (3*3)+(4*4)
How can anyone have doubt in this question. Square of 3= 9 Square of 5= 25 Square of 7= 49 Total is = 83