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# Unit 4: Get ready for circles and solid geometry

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## About this unit

In this unit, we're circling back to one of the most fundamental shapes in geometry: the circle! We'll talk radius, diameter, circumference, and area, and even take a bite out of "pie" to get a full understanding.

### Learn

### Practice

- Radius and diameterGet 5 of 7 questions to level up!
- Circumference of a circleGet 3 of 4 questions to level up!
- Area of a circleGet 5 of 7 questions to level up!
- Circumference of parts of circlesGet 3 of 4 questions to level up!
- Area of parts of circlesGet 3 of 4 questions to level up!

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

### Practice

- Cross sections of 3D objects (basic)Get 3 of 4 questions to level up!

Level up on the above skills and collect up to 160 Mastery points

### Learn

### Practice

- Volume of cylindersGet 3 of 4 questions to level up!
- Volume of spheresGet 3 of 4 questions to level up!
- Volume of conesGet 3 of 4 questions to level up!
- Volume of cylinders, spheres, and cones word problemsGet 3 of 4 questions to level up!

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

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Level up on all the skills in this unit and collect up to 1,100 Mastery points!