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Lines and Angles — Maths STD 9 — Question

Maharashtra BoardEnglish MediumSTD 9MathsLines and Angles2 Marks
Question
Find the measure of an angle which is:
Equal to its supplement.
✓

Answer

Let the measure of the rquired angle be xº.
Then, in case of supplementary angle:
x + x = 180º
⇒ 2x = 180º
⇒ x = 90º
Hence, measure of the angle that is equal to its supplement is 90º.

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