In this lesson our instructor talks about intersecting lines and angle measures. First she discusses intersecting lines and angles. Then she talks about classifying angles and angle relationships. Four extra example videos round up this lesson.
When two or more lines cross each other, they are intersecting lines
An angle has two sides and a vertex
The degree of the angle is the angle measure
Acute angles are less than 90 degrees
Right angles are 90 degrees
Obtuse angles are greater than 90 degrees
Vertical angles: Two opposite angles formed by intersecting lines
Adjacent angles: Angles next to each other and have a common vertex and side
Complementary angles: Two angles that add up to 90 degrees
Supplementary angles: Two angles that add up to 180 degrees
Intersecting Lines and Angle Measures
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
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