1.

Is it possible to construct a right angled triangle whose other two angles are 70° and 21° ? If not, then why ? Justify.

Answer»

No, ∴ Sum of three angles = 180

⇒ 70° + 21 + x° = 180°
⇒ x = 180 – 90°
⇒ x = 89°
≠ 9

∵ Third angle is not a right angle.

Hence. Such right angle triangle is not possible.



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