Question

find the value of x​

Answer 1

Answer:

180-105=75

180-120=60

75+60+x=180. (angle sum property)

135+x=180

x=180-135

x=45

Answer 2

Answer:

$we \: know \: that \: an \: exterior \: angle \: of \: an \: triangle \: is \: equal \: to \\ its \: opposite \: interior \: angles \\ so \: here \: angle \: acd = angle \: x + angle \: abc (exterior \:angle \:property )\\ angle \: abc = 180 - 105 (linear \:pair)\\ = 75 \\ now \: angle \: acd = x + 75 \\ 120 = x + 75 \\ x = 120 - 75 \\ x = 45 \: \\ hope \: it \: helps \: u \: :)$