How do you use the ray tool on the online graphs?

Step-by-step explanation:

First, you click the actual button, then you have to choose a point. After you choose the first point, chose a second point on the graph which creates a ray.

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)