If n = 15, what is the value of the expression below?
6.21 + n × 13 - 30.3
a. 245.43
b. 170.91
c. 231.51
d. 366.933

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.

2b2t

explanation:

2b2t