Hard Math Class 9 Level 1

The angles of a triangle are x + 20°, 2x + 10° and 3x - 30°. What is the correct largest angle?

एक त्रिभुज के कोण x + 20°, 2x + 10° और 3x - 30° हैं। सही सबसे बड़ा कोण क्या है?

A 50° / 50° B 60° / 60° C 70° / 70° D 80° / 80°
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Correct Answer

C. 70° / 70°

Explanation

From x + 20 + 2x + 10 + 3x - 30 = 180 we get x = 30 and angles 50° 70° 60°.

x + 20 + 2x + 10 + 3x - 30 = 180 से x = 30 और कोण 50° 70° 60° हैं।

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