A quadrilateral has 3 acute angles, each of 70° . Find the measure of 4th angle. Is this quadrilateral a parallelogram? Why/why not ?
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Answered by
1
Answer:
the fourth angle is 170°.
and the quadrilateral is not a parallelogram because the oposite lines are not parallel to each other
Answered by
2
Step-by-step explanation:
70°+70°+70°+x=360° (Angle sum property of quadrilateral)
=210°+x=360°
=x=360°-210°
x=150°
This is not a parallelogram, because sum of opposite angle should be 180°.
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