Understanding circles - Mathematics knowledge point

Core concepts

Formulas

= 2

,\qquad

= \frac{

}{2}

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Substitute numbers

r

=3 $\text{cm}$

\begin{aligned}2 \times 3 &= 6\ \text{cm}\end{aligned}

Diagrams

Centre, radius and diameter

Worked example

Example

Solution

Worked example

Worked examples

Example

Quantities in the formula

=

2r

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Answer

!

Worked example

Worked examplesVariant 1

Example

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Worked example

Worked examplesVariant 2

Example

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Answer

Exercises

Fill in the blank

Glossary

Centre
Radius
Diameter

Practice set

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