Question

The radius of a circle is 9cm. Find the length of an arc of this circle which cuts off a chord of length , equal to length and radius.​

Answer 1

Step-by-step explanation:

The answer is 9.42 cm. Explanation: It is an equilateral triangle because of all the side of the triangle are equal i.e 9cm each side

Answer 2

Question:-

The radius of a circle is 9cm. Find the length of an arc of this circle which cuts off a chord of length , equal to length and radius.

Required Answer:-

OA=9cm=OB=OC

CB=9cm

Given,

chord CB=9cm

radii OC=OB=9cm

∠COB=60

(as triangle is an equilateral triangle)

so, length of arc CB=

$\frac{sector \: angle}{360} \times 2\pi \: r$

=

$\frac{60}{360} \times 2\pi \: r \: \times \: 9$

= 18π / 6

=3πcm.

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