A diagonal brace is to be placed in the wall of a room. the height of the wall is 6 ft, and the wall is 12 ft long. what is the exact length of the brace?
we know that Applying the Pythagoras Theorem c=²=a²+b² where c is the diagonal of the wall a=12 ft b=6 ft c²=12²+6²-----> c²=144+36-----< c²=180-----> c=√180------> c=6√5 ft
the answer is the exact length of the brace is 6√5 ft
