Unit 4 - Lesson 2 - Grade 8: Illustrative

What do you notice? What do you wonder?

Elena takes two triangles off of the left side and three triangles off of the right side. Will the hanger still be in balance, or will it tip to one side? Which side? Explain how you know.

If a triangle weighs 1 gram, how much does a square weigh?

Find the weight of a square in Hanger A and the weight of a pentagon in Hanger B.

Write an equation to represent each hanger.

Here is a hanger that is in balance. We don’t know how much any of its shapes weigh. How could you change the number of shapes on it, but keep it in balance? Describe in words or draw a new diagram.