Test Preparation on Mathematics Olympiad Class-7 Test Prep-8

1.

In the following figure, if ∠ 1 + ∠ 3 = 120°, then ∠ 2 + ∠ 4 is equal to
NCERT Solutions for Class 7 Maths Chapter 5 Lines and Angles 29

∠ 2 + ∠ 4 = 360°- (∠ 1 + ∠ 3) = 360°- 120° = 240°

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