body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

Dashboard

Big Ideas Math Integrated I, 2016 View details

6. Describing Pairs of Angles

Continue to next subchapter

Exercise 4 Page 423

Look for symmetries.

See solution.

Practice makes perfect

When solving problems involving complementary angles, supplementary angles, and/or vertical angles, it is often useful to understand how the measures of the angles relate to each other.

Complementary Angles

The sum of the measures of two complementary angles always equals 90^(∘). If they are adjacent angles they must also form a right angle.

Supplementary Angles

The sum of the measures of two supplementary angles always equals 180^(∘). Therefore, if they are adjacent angles they also together form a straight angle.

Vertical Angles

Two angles that are vertical angles always have the same measure.

Subchapter links

Communicate Your Answer p.423

Monitoring Progress p.425-427

Exercises p.428-430

Exercise 4 Page 423

Hints

Check the answer

Practice exercises

Asses your skill

Complementary Angles

Supplementary Angles

Vertical Angles