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126 inches
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Letter A
because we should add the two smaller number in the radical and if the sum equals to the other one. Then, it is a right triangle
Number 3 would be y=4x.
Number 5 would be 9 1/24 for the left side and 133/8 for the right side.
125 is part of a supplementary angle so you need to subtract 125 from 180
which is 55
so the angle adjaecent to to the 125 angle is 55 degrees