Unit 8 - Lesson 9 - Grade 8: Illustrative Mathematics

Over the course of a day:What is the farthest apart the two tips get?

Over the course of a day:What is the closest the two tips get?

Over the course of a day:Are the two tips ever exactly five centimeters apart?

Sort the following six numbers from smallest to largest. Put an equal sign between any you know to be equal. Be ready to explain your reasoning. 1 5 7 x y z

Given the information provided for the right triangles shown here, find the unknown leg lengths to the nearest tenth.

The triangle shown here is not a right triangle. What are two different ways you change one of the values so it would be a right triangle? Sketch these new right triangles, and clearly label theright angle.

The triangle has side lengths 7, 10, and 12. Is it a right triangle? Explain your reasoning.