Question
One of the angles of a quadrilateral is 80º. If ratio of
remaining angles of quadrilateral is 6:3:5 respectively, then find the smallest angle of quadrilateral.Solution
Let the remaining angles of quadrilateral be '6a', '3a' and '5a' respectively.
So, 6a + 3a + 5a + 80 = 360
Or, 14a = 280
Or, 'a' = 20
Therefore, smallest angle = 3 X 20 = 60º
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