Draw the line of reflection that reflects quadrilateral
ABCD onto quadrilateral A'B'C'D'.

correct answer:

b.(19,-2)

the formula of a slope:

we have the points (-2, 7) and (2, 3). substitute:

m∠abd = m∠dbc

step-by-step explanation:

given : ab bisects ∠dbc

as we know that bisection means ab divides   ∠dbc   in two equal angles named as   ∠dba and   ∠abc

so, m∠abd = m∠dbc  

because ab bisects ∠dbc.

hence , the first statement m∠abd = m∠dbc is true.