Question

2
The radiis radius of a circle is 9 cm. Find the
length of an are of this circle which cuts off a chord of length, equal to length a radius?​

Answer 1

Answer:

OA=9cm=OB=OC

CB=9cm

Given,

chord CB=9cm

radii OC=OB=9cm

∠COB=60

o

(as triangle is an equilateral triangle)

so, length of arc CB=(

360

o

sectorangle

)×2πr

=

360

o

60

o

×2π×9

=

6

18π

=3πcm.