Question

find x in the figure class 9​

Answer 1

Answer:

360°=100°+123°

360°=223°

360°-223°

=137°

Answer 2

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$x + 100 + 123 = 360 \\ \implies \: x = 360 - 100 - 123 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 137$