Question

finfd the angle subtended at the centre of a circle of radius 6 cm by an arc of length 3 pi​

Answer 1

Step-by-step explanation:

The length of the arc

$= \frac{theta}{360} \times circumference \: (2\pi \: r) \\ \frac{theta}{360} \times 2\pi6 = 3\pi \\ = \frac{theta}{360} \times 4 = 1 \\ theta = 90 \: degrees$

So the angle subtented at the centre is 90 degrees