Respuesta :

Sum of adjacent angles on a straight line is 180.
Let  ∠CAB = x

∠CAB = x
∠CAD = 2∠CAB = 2x

x + 2x = 180
3x = 180
x = 60

Answer: ∠CBA = 60°
1rstar
[tex]LINES \: \: AND \: \: ANGLES \\ \\ \\

As \: you \: can \: see \: , \: angle \: CAD \: and \: \\ angle \: CAB \: forms \: a \: Linear \: Pair \: \\ \\ Therefore \: \: CAB \: + \: CAD \: = \: 180 \\ \\ Now \: , \: Its \: given \: that \: \: CAD \: = \: 2 \: CAB \: \\ \\ \\ Putting \: in \: the \: first \: expression \: \\ \\ CAB \: + \: 2CAB \: = \: 180 \: \: \\ \\ 3 \: CAB \: = \: 180 \\ \\ CAB \: = \: \frac{180}{3} \: \: \\ \\ \\ CAB \: \: = \: \: 60 \: \: \: Ans.[/tex]
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