Find the perimeter when 115 triangles are put together in the pattern shown below. Assume that all triangle sides are 1 cm long. The perimeter is cm.

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

What expression is equivalent to 42x-56y

Lines b and c are parallel. what is the measure of 2? m2 = 31° m2 = 50° m2 = 120° m2 = 130°