In the adjoining figure, find the value of 'a'.

60^o

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25^o

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30^o

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75^o

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Solution

The correct option is B
25^o

35^o + a + 70^o + 2a = 180^o

3a + 105^o = 180^o

3a = 180^o - 105^o

3a = 75^o

a = 25^o

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Similar questions

{cos}^{2} 75^{o} + {cos}^{2} 45^{o} + {cos}^{2} 15^{o} - {cos}^{2} 30^{o} - {cos}^{2} 60^{o}

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