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Question

The angles P, Q, R and S of a trapezium PQRS are in the ratio 1:3:7:9. Match the angle to its correct value.

A
162°
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B
126°
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C
18°
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D
54°
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Solution

As the angles are in the ratio 1:3:7:9
We can take the angles as x, 3x, 7x and 9x.
x+3x+7x+9x=360
20x=360
x=18
P=x=18,
Q=3x=54
R=7x=126
S=9x=162

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