Can you round it to the underlined digit

Suppose a triangle has two sides of length 32 and 35, and that the angle between these two sides is 120°. which equation should you solve to find the length of the third side of the triangle?

Can someone me with my math problems i have a bunch. i will give brainliest and lots of pleeeaaasssee

Which point-slope form equation represents a line that passes through (3,-2) with a slope of -4/5