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Question

Two adjacent angles of a parallelogram are in the ratio 1 : 2. The angles are

A
20 and 40
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B
30 and 60
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C
60 and 120
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D
None of these
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Solution

The correct option is C 60 and 120
The sum of 2 adjacent angles of a parallelogram is 180 degrees.
Let the angles are x and 2x.
x + 2x =180o
3x=180
x=60o
Hence angles are x=60o and 2x=120o.

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