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

BI

Big Ideas Math: Modeling Real Life, Grade 8 View details

Chapter Review

Finish the assignment

Continue to next subchapter

Exercise 4 Page 131

Use the relationship of angles between parallel lines.

40^(∘), see solution.

Practice makes perfect

Let's consider the given diagram.

To find the measure of ∠ 2, note that the given angle and ∠ 2 form a straight line.

This means that they are supplementary and the sum of their measures is 180^(∘). With this information, we can finally find the measure of ∠ 2. m∠ 2+ 140^(∘)=180^(∘) ⇕ m∠ 2=40^(∘)