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15.01 Introducing the circle

Interactive practice questions

Consider the circle shown.

a

State the diameter of the circle in terms of $x$x.

b

State the circumference of the circle in terms of $\pi$π and $x$x.

Easy
1min

The diagram shows a semicircle of radius $r$r.

Easy
2min

The diagram shows a quarter circle of radius $r$r.

Easy
2min

Determine whether the following statements are true about $\pi$π.

Easy
2min
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Outcomes

MA4-12MG

calculates the perimeters of plane shapes and the circumferences of circles

MA4-13MG

uses formulas to calculate the areas of quadrilaterals and circles, and converts between units of area

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