Iam a closed shape made of 6 line segments. i have two angles less than right angle & no right angles. what shape am i?

Write the standard form of an equation with (see picture below)

Aconstruction worker needs to put a rectangular window in the side of a building he knows from measuring that the top and bottom of the window have a width of 8bfeet and the sides have a length of 15 feet he also measured one diagonal to be 17 feet what is the length of the other diagonal

If a=0.333333 and b=0.55555, what is the value of a+b