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Question

Two adjacent angles of a parallelogram are (3x4)o and (3x+10)o. Find the angles of the parallelograms.

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Solution

We know that in parallelogram, sum of adjacent angles is 180o
(3x4)o+(3x+10)o=180o
3x4+3x+10=180o
6x6=180o
6x=174o
x=174o6
x=29o.
(3x4)o=(3×294)o=83o
(3x+10)o=(3×29+10)o=97o
We know that, in parallelogram opposite angles are equal.
Four angles of parallelogram are 83o,97o,83o and 97o.

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