Explain why each is either true or false.

Step-by-step explanation:

1.

True as angle on the circumference is half the angle at the center.

2.False ,tangent is perpendicular to radius or diameter at the point of contact.

3. True,tangent is perpendicular to radius at the point of contact.

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)