Given the area of the shaded region is \(132.\,97\text{ cm}^2\).
Find the radius, \(r\), in \(\text{cm}\).
Use \(\pi=3.142\).
\(10 \text{ cm}\)
The diagram shows a circle with centre \(O\).
The area of the shaded region is \(349.2 \text{ cm}^2\).
By using \(\pi=3.142,\) find the radius, in \(\text{cm}\), of the circle.
\(\begin{aligned}13.9582 \text{ cm}\end{aligned}\)
In the diagram, \(AOBQ\) is a semicircle with centre \(O\) and a radius of \(8 \text{ cm}\).
\(BPC\) is a sector of a circle with centre \(P\) and a radius of \(12 \text{ cm}\).
It is given that \(OQ\) is perpendicular to \(AOB\).
By using \(\pi=3.142\), find the area, in \(\text{cm}^2\), of the shaded region.
\(15.\,45 \text{ cm}^2\)
The diagram shows a semicircle \(BPAD\) with centre \(O\) and a radius of \(8 \text { cm}\).
\(AC\) is an arc of a circle with centre \(B\) and
\(\angle{AOC}=1 \text{ radian}.\)
Using \(\pi=3.\,142\), find the length, in \(\text{cm}\), of the chord \(AB\).
\(14.\,04 \text{ cm}\)
The diagram shows a semicircle \(PTS\) with centre \(O\) and a radius of \(16 \text{ cm}\).
\(QST\) is a sector of a circle with centre \(S\) and \(R\) is the midpoint of \(OP\).
Using \(\pi=3.\,142\), calculate the area, in \(\text{cm}^2\), of the shaded region.
\(34.\,82 \text{ cm}^2\)
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