# (8) Inquiry Lab - Triangles

25 Oct 2018
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### (8) Inquiry Lab - Triangles

• 1. WHAT is the relationship among the measures of the angles of a triangle? Course 3, Inquiry Lab before Lesson 5-3 Geometry
• 2. • 8.G.5 Use informal arguments to establish facts about the angle sum and exterior angle of triangles, about the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles. Mathematical Practices 1 Make sense of problems and persevere in solving them. 3 Construct viable arguments and critique the reasoning of others. Course 3, Inquiry Lab before Lesson 5-3 Common Core State Standards © Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved. Geometry
• 3. Course 3, Inquiry Lab before Lesson 5-3 Activity continued  Geometry Triangle means three angles. In this Activity you will explore how the three angles of a triangle are related. On a separate piece of paper, draw a triangle like the one shown below.
• 4. Course 3, Inquiry Lab before Lesson 5-3 Activity continued  Geometry Triangle means three angles. In this Activity you will explore how the three angles of a triangle are related. Label the corners 1, 2, and 3. then tear off each corner.
• 5. Course 3, Inquiry Lab before Lesson 5-3 Geometry Triangle means three angles. In this Activity you will explore how the three angles of a triangle are related. Rearrange the torn pieces so that the corners all meet at one point. Label the torn pieces with 1, 2, and 3. What does each torn corner represent? _____________________________________________ The point where these corners meet is the vertex of another angle. Classify the angle as acute, right, obtuse, or straight. Explain. ______________________________________________________
• 6. Course 3, Inquiry Lab before Lesson 5-3 WHAT is the relationship among the measures of the angles of a triangle? Geometry