Calculate the length of an arc of a circle of d... - JAMB Mathematics 2007 Question
Calculate the length of an arc of a circle of diameter 14cm, which subtends an angle of 90o at the centre of the circle
A
14\(\pi\) cm
B
7\(\pi\) cm
C
5\(\pi\) cm
D
4\(\pi\) cm
correct option: d
Length of an arc \(\frac{\theta}{360^o}\pi d\)
= \(\frac{90^o}{360^o}\) x \(\pi\) x 4cm
= 4\(\pi\) cm
= \(\frac{90^o}{360^o}\) x \(\pi\) x 4cm
= 4\(\pi\) cm
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