Geometry 3-5 Guided Practice: Parallel Lines and Triangles

By Matt Richardson
Last updated about 3 years ago
12 Questions

Solve It! What is the sum of the meaures of the three angles of your triangle?
Enter only a number.

Solve It! Do all triangles have the same interior angle sum? How does the Solve It! activity support your answer?

Take Note: Summarize The Parallel Postulate. You may use the canvas to help illustrate your explanation.

Take Note: Summarize Theorem 3-11. You may use the canvas to help illustrate your explanation.

Take Note: Define auxiliary line. You may use the canvas to help illustrate your explanation.

Problem 1 Got It?

Take Note: Define remote interior angles. You may use the canvas to help illustrate your description.

Take Note: Summarize The Triangle Exterior Angle Theorem. You may use the canvas to help illustrate your description.

Problem 2 Got It? Two angles of a triangle measure 53. What is the measure of an exterior angle at each vertex of the triangle?

Problem 3 Got It? In Problem 3, can you find m∠A without using the Triangle Exterior Angle Theorem?

Take Note: Summarize the mathematical content of this lesson. What topics, ideas, and vocabulary were introduced?