Calculate the area of this semi-circle. (Answer given is rounded to 1 decimal place).
\[50.3\,cm^{2}\]
\[25.1\,cm^{2}\]
\[100.4cm^{2}\]
Calculate the perimeter of this semi-circle. (Answer given is rounded to 1 decimal place).
\[33.12\,cm\]
\[12.6\,cm\]
\[20.6\,cm\]
A semicircular glass window sits on a ledge which is \(1.3m\) wide.
Calculate the cost of the glass used in it when it is priced at \(\pounds48.50\) per square meter. Give your answer to the nearest 10 pence. (Take \(\pi = 3.14\)).
\[\pounds32.20\]
\[\pounds37.30\]
\[\pounds36.10\]
A \(400\,m\) running track is \(65\,m\) wide. It is made up of two equal straight sections and two equal semi-circles. A sketch, which is not to scale, is shown.
How long is one straight section. (Take \(\pi=3.14\)).
\[91.48\,m\]
\[97.95\,m\]
\[93.26\,m\]
Calculate the area of this kite. The sketch is not to scale.
\[20\,cm^{2}\]
\[11.78\,cm^{2}\]
\[10\,cm^{2}\]
Calculate the area of this shape. (Answer given is rounded to 1 decimal place).
\[138.7cm^{2}\]
\[121.4cm^{2}\]
\[101.4cm^{2}\]
Calculate the area of this triangle.
\[16cm^{2}\]
\[8.2cm^{2}\]
\[8cm^{2}\]