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# Unit 13: Triangle side lengths

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## About this unit

The Pythagorean theorem describes a special relationship between the sides of a right triangle. Even the ancients knew of this relationship. In this topic, we’ll figure out how to use the Pythagorean theorem and prove why it works.### Learn

### Practice

- Use Pythagorean theorem to find right triangle side lengthsGet 5 of 7 questions to level up!
- Use Pythagorean theorem to find isosceles triangle side lengthsGet 5 of 7 questions to level up!
- Right triangle side lengthsGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 320 Mastery points

### Learn

### Practice

- Use Pythagorean theorem to find perimeterGet 3 of 4 questions to level up!
- Use Pythagorean theorem to find areaGet 3 of 4 questions to level up!
- Pythagorean theorem word problemsGet 3 of 4 questions to level up!
- Pythagorean theorem in 3DGet 3 of 4 questions to level up!

### Learn

### Practice

- Distance between two pointsGet 5 of 7 questions to level up!

Level up on the above skills and collect up to 400 Mastery points

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Level up on all the skills in this unit and collect up to 900 Mastery points!