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Unit 8 - Lesson 8 - Grade 8: Illustrative Mathematics

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Grade 8 Unit 8
Lesson 8: Finding Unknown Side Lengths
CC BY 2021 Illustrative Mathematics®
Grade 8 Unit 8
Lesson 8: Finding Unknown Side Lengths
CC BY 2021 Illustrative Mathematics®
Lesson: Finding Unknown Side Lengths

Which One Doesn’t Belong: Equations (Warm Up)

Which one doesn’t belong?

Which One Is the Hypotenuse?

Label all the hypotenuses with c.

Find the Missing Side Lengths

Find c.

Find b.

A right triangle has sides of length 2.4 cm and 6.5 cm. What is the length of the hypotenuse?

A right triangle has a side of length 1/4 and a hypotenuse of length 1/3. What is the length of the other side?

Find the value of x in the figure.

Cool Down: Could be the Hypotenuse, Could be a Leg

Could be the Hypotenuse, Could be a Leg

A right triangle has sides of length 3, 4, and x.

Find x if it is the hypotenuse.

Find x if it is one of the legs.