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Big Ideas Math: Modeling Real Life, Grade 8

BI

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

2. Angles of Triangles

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Exercise 3 Page 115

Use the relationship of angles between parallel lines.

Angle Measure: 82^(∘)
Explanation: See solution.

Practice makes perfect

Let's consider the given diagram.

angles

To find the measure of ∠ 4, we will use the fact that corresponding angles of parallel lines are congruent.

angles

Since 82^(∘) and ∠ 4 are corresponding angles and lines j and k are parallel, these angles are congruent. m∠ 4 = 82^(∘)

Subchapter links

Try It p.112-113

Self-Assessment for Concepts & Skills p.113

Self-Assessment for Problem Solving p.114

Review & Refresh p.115

Concepts, Skills, & Problem Solving p.115-116