Parts of a circle
Illustrate and name parts of circles, including radius, diameter, and circumference; know that the diameter is twice the radius
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Teaching Table
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“If you give your child a round plate and a ruler, can they measure the diameter — and explain how the radius compares to the diameter?”
Full guide and materials
- Activity. Illustrate and name parts of circles, including radius, diameter, and circumference; know that the diameter is twice the radius
What to notice. Label the radius, diameter, and circumference on a circle diagram • Calculate the diameter given a radius of 4.5 cm (diameter = 9 cm) • Explain the relationship between radius and diameter in their own words
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If you give your child a round plate and a ruler, can they measure the diameter — and explain how the radius compares to the diameter?
Illustrate and name parts of circles, including radius, diameter, and circumference; know that the diameter is twice the radius
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Check understanding
- Label the radius, diameter, and circumference on a circle diagram
- Calculate the diameter given a radius of 4.5 cm (diameter = 9 cm)
- Explain the relationship between radius and diameter in their own words
“If you give your child a round plate and a ruler, can they measure the diameter — and explain how the radius compares to the diameter?”
Curriculum record
- Type
- Conceptual
- Subject
- Mathematics
- Domain
- Geometry
- Age range
- Ages 10–11