What is the 4th term of the expansion of (1-2x)^n if the binomial coefficients are taken from the row of Pascal's triangle shown below? 1 6 15 20 15 6 1

A: -160x^3

B: -20x^3

C: 160x^3

D: 240x^4​

160

step-by-step explanation:

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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.