Question

The difference between the measures of two angles of linear pair is 80 ° .Find the smaller angle .

Answer 1

Let the first angle(smaller one) = x
second angle (larger one) = 180-x
So,
180 - x - x = 80
-2x = -100
x = 50
Smaller angle measures 50°
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Answer 2

Let the smallest angles be x and second angle be 180-x  Then sum of all three angles is equal to 80 bcoz measures of two angles of linear pair is 80 °  Then  -x -x + 180 = 80  -2x = 80 - 180  -2x = -100  Minus and Minus from both sides are canceled  2x = 100  And x =50  Hope this helps u