15
QuizMultiple Choice

Chapter 7 Unit TEST: Quadrilaterals and Other Polygons

Question 15 • (OC27) GEO-1206310-S2-Degele-VOL7006P

Jacob is cutting a tile in the shape of a parallelogram. Two opposite angles have measures of (6n − 70)° and (2n + 10)°.What are the two different angle measures of the parallelogram-shaped tile?

Answer
2
20° and 160°
5
50° and 130°
3
30° and 150°
7
70° and 110°

Explanation

Opposite angles in a parallelogram are equal, so set 6n − 70 equal to 2n + 10. Solving gives 4n = 80, or n = 20, and each of those opposite angles measures 50°. Adjacent angles are supplementary, so the other angle measure is 180° − 50° = 130°. The two different angle measures are 50° and 130°.

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