### Arithmetic

### Equations

### Powers of ten

### More fractions

### Mixed numbers

### Negative numbers

### Rounding

### Ratio

### Harder equations

### Keyword of the day

Radius

The distance from the centre of a circle to its circumference. The plural of radius is radii.

Tuesday

19th October 2021

19th October 2021

Radius

The distance from the centre of a circle to its circumference. The plural of radius is radii.

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