A geometric sequence has a first term of 83 and a fourth term of 9.
find the common ratio

step-by-step explanation:

yes it represnts a functio, their are not 2 of the same numbers on the both sides

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.