Calculate the arc length to 2 decimal places. First calculate what fraction of a full turn the angle is. 90° is one quarter of the whole circle (360°). The arc length is \(\frac{1}{4}\) ...
In order to derive the formula to calculate the angle at the centre of the sector, the formulae for the arc length and area of ... 17^\circ\) (to the nearest degree) Now try the example question ...
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