Work within a parallel universe. Scholars learn about the relationships of angles when two parallel lines are intersected by a transversal. They see how to find the measurements of all eight angles by knowing the measure of one angle. Using algebraic skills, individuals calculate the measures of angles in figures.

Concepts

parallel lines, parallel lines with a transversal, alternate interior angles, corresponding angles, vertical angles, straight angles

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Instructional Ideas

• Create a postulate/theorem wall with the text of the postulates and theorems from the lesson; continue to add to it as the unit progresses

Classroom Considerations

• Assumes the class knows how to solve linear and quadratic equations
• Second lesson in a seven-part unit

• This video is hosted on YouTube

Pros

• Uses colors to highlight different types of angles
• Shows the steps in solving the algebraic solutions to the problems

Cons

• None

Common Core

SL.9-10.2 SL.11-12.2 MP3 MP6 HSG-CO.C.9