2, Lesson 14, Unit 2, Grade 8, EngageNY icon
Instructional Activity


Lesson 14. Unit 2. Grade 8 EngageNY

EngageNY7 min(s)

This Instructional Activity is a part of the Lesson 14, Unit 2, Grade 8. Let's look at one final proof that the sum of the degrees of the interior angles of a triangle is 180. Start with a rectangle. What properties do rectangles have? All four angles are right angles; opposite sides are equal in length. If we draw a diagonal, what shapes are formed?

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