MY WHOLE GRADE DEPENDS ON THIS -2/5 -4/5 + (9/10) = ?

In the coordinate plan (-6,9) b (3,9) c (3,3) def is shown in the coordinate plan below

Drag the tiles to the correct boxes to complete the pairs. match the cart-coordinates with their corresponding pairs of y-coordinates of the unit circle

Which of the following correctly justifies statement four of the two column proof? a. corresponding angles theorem b. transitive property of equality c. vertical angle theorem d. substitution property of equality