Larissa is standing at point L, Paige is standing at point P, and Raelynn is standing at point R on segment LR, as shown in the figure. If LR = 12 and PR = 4, find LP. Explain. LP = 16 because LR + PR = LP according to the Segment Addition Postulate, and 12 + 4 = 16 using substitution. LP = 8 because LP + PR = LR according to the Segment Addition Postulate, and 8 + 4 = 12 using substitution. LP = 16 because 12 + 4 = 16 according to the addition property of equality. LP = 8 because 12 − 4 = 8 according to the subtraction property of equality.