in every die thrown 100 times a six occurs 32 times
so the probability of obtaining a die after 100 throws = 
Complementary angles always equal 90°
So here is how to find what mCYD + mFZE equal
mCYD + mFZE + mAXB
mCYD + mFZE + 36° = 90°
Subtract
mCYD + mFZE = 54°
8, 3/4-foot lengths of pipe can be cut from a 6 1/3-foot pipe.
Hope this helps you :)