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max2010maxim [7]
3 years ago
5

WXYZ is a parallelogram. Find the measure of angle Z

Mathematics
1 answer:
Delvig [45]3 years ago
5 0

Given:

The figure of a parallelogram.

To find:

The measure of angle Z.

Solution:

We know that, the consecutive interior angles of a parallelogram are supplementary angles, it means there sum is 180 degrees.

In the given figure angle W and angle Z are supplementary angle. So,

m\angle W+m\angle Z=180^\circ

(18b-11)^\circ+(9b+2)^\circ=180^\circ

(27b-9)^\circ=180^\circ

(27b-9)=180

Adding 9 on both sides, we get

27b=180+9

27b=189

b=\dfrac{189}{27}

b=7

Now,

m\angle Z=(9b+2)^\circ

m\angle Z=(9(7)+2)^\circ

m\angle Z=(63+2)^\circ

m\angle Z=65^\circ

Therefore, the correct option is C.

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