Lesson 15. Unit 1. Grade 8 Open Up Resources

This Problem Set is a part of the Lesson 15, Unit 1, Grade 8. Observe that the sum of the angles in a triangle is 180 degrees. Observe that the sum of the angles in a triangle is 180 degrees. Let's explore angles in triangles.

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Lesson 11. Unit 1. Grade 8. Open Up Resources

Lesson 12. Unit 1. Grade 8. Open Up Resources