Q22 of 158 Page 159

In Fig. 6.11, the value of

∠A + ∠B + ∠C + ∠D + ∠E + ∠F is


As we can there are 2 triangles ΔABC and ΔDEF


∴ By angle sum property of triangle


∠A + ∠B + ∠C = 180°


∠D + ∠E + ∠F = 180°


∠A + ∠B + ∠C + ∠D + ∠E + ∠F = 180° + 180°


= 360°

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