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Chapter 10 Class 7 Practical Geometry
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Ex 10.4, 3 - Examine whether you can construct DEF such that EF = 7.2

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Ex 10.4, 3 Examine whether you can construct ∆DEF such that EF = 7.2 cm, m∠E = 110° and m∠F = 80°. Justify your answer. We know that Sum of angles of a triangle = 180° But here, ∠ E + ∠ F = 110° + 80° = 190° > 180° Since sum of two angles cannot be greater than 180° ∴ Δ DEF is not possible

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