Question
Class 6MathematicsUnderstanding Elementary Shapes

In the given figure, find the measure of the angles marked with a, b, c, d, e and f.

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∠a = 180° -129° = 51°

∠b = 180° – (51° + 92°)

= 180° – 143° = 37°

∠c = 180° – 88° = 92°

∠d = 180° – 152° = 28°

∠e = 180° – 143° = 37°

∠f= 180° – (∠e + ∠d)

= 180° – (37° + 28°)

= 180°- 65°= 115°

∠g = 180° – ∠f = 180° – 115° = 65°