a. Imagine the triangle described by the points (−3,6),(x,6), and (x, y) where x > − 3 and y > 6. Write an expression for the length of the horizontal leg in terms of x?

correct

step-by-step explanation:

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)