Corey is making a wall-mounted bookshelf. It has 2 shelves, with a third piece of wood intersecting them. To support the shelves, Corey orders some L-brackets to put between the shelves and the crosspiece. He measures angle 6. How many brackets should he order to have one for every angle that is congruent to angle 6? Explain. Two parallel lines intersected by a transversal. The angles formed along the top line, starting at the top left and moving clockwise, are 1, 2, 4, and 3. The corresponding angles formed along the bottom line, starting at the top left and moving clockwise, are 5, 6, 8, and 7. A. 2; ∠7 is congruent to ∠6. B. 2; ∠3 is congruent to ∠6. C. 3; ∠7, ∠3 are both congruent to ∠6. D. 4; ∠7, ∠2, ∠3 are all congruent to ∠6.