9. The measures of the angles of a quadrilateral are in the ratio 2 : 4:5: 7. Find the measure of each of its angles.
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40,80,100,140
Step-by-step explanation:
Let x be the common multiple.
2x+4x+5x+7x=360
Sum of angles in a quadrilateral is 360
0
18x=360
x=20
∴ 2x=2×20=40,4x=4×20=80,5x=5×20=100,7x=7×20=140
40,80,100,140 are angles of quadrilateral.
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