Question

if an angle is three times of its supplement find the angle​

Answer 1

$Answer \:$

We know that :

The sum of Supplementary angle is 180°

Now :

Let the angle be (180°-x)

A/C :

x = 3(180-x)

➠ x = 540 - 3x

➠ x + 3x = 540

➠ 4x = 540

➠ x = 540/4

➠ x = 135

Therefore, The angle is 135°

Answer 2

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Let the angle be x it's supplement = (180-x)

$\sf x = 3 (180-x)\\ \sf⇒x=540−3x\\ \sf⇒4x=540\\ \sf⇒x=135°$