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Mathematics

Grade9

Easy

Question

The sector below has an arc length of 30 cm. Calculate the length of x.

12.73
13.46
12.57
14.75

hint Hint:

Arc length = $fraction numerator theta over denominator 360 end fraction cross times 2 cross times pi cross times r$

The correct answer is: 12.73

Correct attempt to form an equation for the arc length 30 = $fraction numerator 135 over denominator 360 end fraction cross times 2 cross times pi cross times x$
Attempt to solve equation for x, with one step completed correctly 80 = $2 cross times pi cross times x$
40 = $pi cross times x$
=12.732…
=12.73

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