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Year 11 Maths - General Linear Relations and Equations

Constructing a Table of Values

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Questions
Question 1
19667

The circumference \((C)\) a circle is given by \(C = 2\pi r\), where \(r\) is the radius.

Complete the last two entries in the following table, giving your answers correct to two decimal places.

\begin{array}{|c|c|c|c|c|}
\hline \mathbf{r} & \mathbf{1} & \mathbf{1 . 5} & \mathbf{2} & \mathbf{2 . 5} \\
\hline \mathbf{C} & 6.28 & 9.42 & & \\
\hline
\end{array}

12.57, 15.71

\begin{aligned}
&\text { when } r=2, \quad C=2 \pi \times 2=4 \pi=12.57 \\
&\text { when } r=2.5,\; C=2 \pi \times 2.5=5 \pi=15.71
\end{aligned}

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