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Question

In parallelogram ABCD, $$\angle A  = 3 \angle B$$. In the same parallelogram, if AB $$= 5x-7$$ and $$CD = 3x + 1$$; find the length of CD.


A
CD=16 units
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B
CD=11 units
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C
CD=13 units
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D
CD=15 units
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Solution

The correct option is D $$CD = 13$$ units

AB $$= $$ CD ( Opposite sides of parallelogram) 
 $$\implies 5x -7 = 3x + 1$$
$$\implies x = 4 $$
$$\therefore$$ AB $$=$$ CD$$ = 13 $$ units.

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