Corey i making a wall-mounted bookhelf. It ha 2 helve, with a third piece of wood interecting them. To upport the helve, Corey order ome L-bracket to put between the helve and the cropiece. He meaure angle 6. How many bracket hould he order to have one for every angle that i congruent to angle 6? Explain. Two parallel line interected by a tranveral. The angle formed along the top line, tarting at the top left and moving clockwie, are 1, 2, 4, and 3. The correponding angle formed along the bottom line, tarting at the top left and moving clockwie, are 5, 6, 8, and 7. A. 2; ∠7 i congruent to ∠6. B. 2; ∠3 i congruent to ∠6. C. 3; ∠7, ∠3 are both congruent to ∠6. D. 4; ∠7, ∠2, ∠3 are all congruent to ∠6