Question

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Answer 1

$12) \\ given \: that \: two \: angles \: are \: four \: times \: the \: third \: angle \: \\ so \\ x + 4x = 180 \\ 2x = 45 \\ x = 22.5 \: degree \\ 13)adc \\ abc \\ cba \\ cda \\ 14)all \: three \: statements \: are \: true$