Lesson: Vertically Opposite Angles Holt Mathematics • Course 1 • Geometry • Concepts and Skills • Math in Focus • Singapore Math • Course 2 • Volume B • Common Core • enVisionmath2.0 • Grade 7 • Volume 2 • Common Core • Math in Focus • Singapore Math • Grade 5 • Volume B • Common Core • Prentice Hall • Geometry • Common Core • Math Connects • Concepts, Skills, and Problem Solving • Course 3 • Student Edition

Mathematics

In this lesson, we will learn how to investigate the relationship between angles in intersecting lines and find the measure of unknown angles.

Video

13:46

Q1:

If two angles are vertically opposite, are they equal in measure?

Q2:

Given that lines and intersect at , find .

Q3:

In the figure, lines and intersect at . What is ?

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