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Question

The sum of two angles of a quadrilateral is 150o and the other angles are in the ratio 2:3. Find the measure of two angles.

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Solution

The sum of first angle second angle =150o
The ratio of third and fourth angle is 2:3
Let third angle fourth angle be 2x and 3x.
We know that in quadrilateral sum of four angles is 360o.
150o+2x+3x=360o
5x=210o
x=42o
Now, 2x=2×42o=84o
3x=3×42o=126o
The measure of two angles are 84o and 126o

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