Examine the paragraph proof. Which theorem does it offer proof for? Prove: XVZ - WVY
We are given an image of WZ and XY, which intersect at point V. m. XVZ m ZVY = 180" by the Definition of Supplementary Angles. m. ZVY + m WVY - 180° by the
Definition of Supplementary Angles. Since the sum of m XVZ ZVY m. ZVY m. WY by the Transitive Property of Equality, m. ZVY can be subtracted from both sides
of the equation because of the Subtraction Property of Equality. Therefore, m. XVZ = m WVY and _XVZ - WY by the definition of congruent angles.