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Big Ideas Math Integrated I, 2016

BI

Big Ideas Math Integrated I, 2016 View details

6. Describing Pairs of Angles

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Exercise 18 Page 428

Vertical angles are two angles whose sides are opposite rays.

No, only one pair of sides are opposite rays.

Practice makes perfect

Vertical angles are two angles whose sides are opposite rays. This means that the rays point in opposite directions forming straight lines. Examining the figure, we can see that this is the case only for one pair of sides.

Since only one pair of sides are opposite rays, ∠2 and ∠5 are not vertical angles.

Subchapter links

Communicate Your Answer p.423

Monitoring Progress p.425-427

Exercises p.428-430