Question

What is the length of stack F N with bar on top when DM = 8 in., DN = 17 in., and MF = 10 in.? Round your answer to the nearest tenth of an inch.

Answer 1

We can find the length of this side with 
AB² = BC² + AC²
where AB is the length, BC is the width and AC is the height
AB² = 10² + 8²
AB² = 100 + 64
AB² = 164
AB = √164
AB = 12.81
or 
AB = 12.8