The scale factor of two similar figures is 4:5. What is the ratio of their perimeters?
4:5
64:125
16:25
8:10

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3

68719476736

step-by-step explanation:

8*8*8*8*8*8*8*8*8*8*8*8=68719476736

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.