The sum of the angle measures of a triangle is 180° m∠A + m∠B + m∠C = 180°
Triangle Sum Theorem

Exterior Angle Theorem

Third Angle Theorem

Centroid Theorem

Which sentence describes why polygon mnop is congruent to polygon jklp? a. polygon jklp maps to polygon mnop through a translation. b. polygon jklp maps to polygon mnop through a rotation. c. polygon jklp maps to polygon mnop through a dilation. d. polygon jklp maps to polygon mnop through a stretch.