Question

find the angle which is twice it's supplementary​

Answer 1

Answer: 120°

Step-by-step explanation: Let the angle be 2x°

then 2x° + x° = 180°

⇒ 3x° = 180°

⇒ x° = 60°

∴The number is 2x° = 2 * 60° = 120°

Answer 2

Answer:

Let the angle be x

then it's supplement will be 180° - x

given , angle is twice it's supplementary

so , x = 2( 180° -x )

x = 360° - 2x

3x = 360°

x = 120°

so the required angle is 120° or 2π/3

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