Question

180°+200°+x°=360°. Find value of x

Answer 1

180°+200°+x°=360°
x=360-200-180
x=160-180
x=-20°

that means x is an exterior angle of 20°

Answer 2

$\huge{HEY!!}$
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⭕We can find the value of x in this question like this,

⭕180° + 200° + x° = 360°

⭕200° + x° = 360° - 180°

⭕200° + x° = 180°

⭕x° = 180° - 200°

⭕x° = -20°

⭕⭕There is not any angle like -20°. So, it can be identified that the value of x will be 20° of exterior angle.