Given: T(-4,-1), R(-2,5), A(4,8), and P(8,5) are vertices of quadrilateral TRAP. Prove: TRAPis a trapezoid. Statements 1. T(-4,-1), R(-2,5), A(4,8), and P(8,5) are vertices of quadrilateral T 2. slope of TR: 5-1) = 3, slope of RA: = slope of AP: 8-5 5-8 -2-(-4) 4-(-2) -1-5 -4-8 3. ? = 4. TRAP is a trapezoid. What is step 3 to complete the proof? OA TRI RAby the definition of perpendicular lines OB. RA || PT by the definition of parallel lines​