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Two angles measure (40-a) and (120-2a). …

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Two angles measure (40-a) and (120-2a). If both the angles are supplementary of one other, find the value of a?

Posted by Aditya Chhetri 7 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Harshal Bhambhani 7 years, 10 months ago

As both angles are supplementary so, => (40-a)° +(120-2a)°= 180° => 40-a + 120 -2a = 180 => 160 - 3a = 180 => -3a = 180-160 => -3a = 20 Or 3a = -20 So, a = -20/3 = - 6.6666....

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