BRAINLIEST!!
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The answer to your question is below

Step-by-step explanation:

1) The triangles are similar by the AA postulate so use proportions to find x.

          x/207 = 170/90

solve for x

          x = 207(170/90)

          x = 207(1.89)

         x = 391 ft

2) These triangles are similar so use proportions to solve it

          x/138 = (x + 60)/207

         207x = 138(x + 60)

         207x = 138x + 8280

          207x - 138x = 8280

                      69x = 8280

                         x = 8280/69

                         x = 120

1) 391 ft

2) 120

Step-by-step explanation:

Using similar figures

X/170 = 207/90

X = 170 × 207/90

X = 391 ft

X/(X+60) = 138/207

207X = 138X + 8280

69X = 8280

X = 120

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.