Question

The length of an arc of a circle is 12 cm. the corresponding sector area is 108 cm. find
the radius of circle?
The angle subtended at the center of the circle by the arc?



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Answer 1

Answer:

(a.)

(pi*r^2)/(2pi*r) = 108/12

r = 108/6 = 18 cm

ok

Answer 2

Given:

Length of an arc of a circle is 12 cm. the sector area is 108 cm.

To find:

Find the radius of circle and angle subtended at the center of the circle by the arc.

Step-by-step explanation:

π*$r^{2}$/(2π*r)

$\frac{108}{12}$

$2*r=\frac{108}{12}$

$r=\frac{108}{6}$

$r=18$

Answer:

The radius of circle: 1:0

The center of the circle by the arc in r=18 cm