Acarpenter is framing a wall that is 8 feet high and 15 feet long. if the carpenter wants to be sure that the sides of the wall meet at right angles, then what should the diagonal measurement of the wall be? a. 13 feet b. 17 feet c. 19 feet

This problem may be solved through the Pythagorean theorem which may be expressed as,
                              c² = b² + a²
where c is the hypotenuse and b and a are the legs. Substituting,
                              c² = (8 ft)² + (15 ft)²
The value of c from the equation is 17 ft. Thus, the answer is letter B. 

High is 8 & long is 15
so according to petagoras rule
a×a=b×b+c×c
b=8 &c=15
so a×a= 8×8+15×15
a×a=64+225=289
a=17
diagonal is 17

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