OAB is a sector of a circle with radius 9cm and center O. The angle at O is 30°.

Area of sector = 21.195 cm²

length of arc =  4.71 cm

Step-by-step explanation:

Given:

Radius of circle (r) = 9 Cm

Angle at O = 30°

Find:

Area of sector.

length of arc.

Computation:

⇒ Area of sector = [θ/360]πr²

Area of sector = [30/360]3.14(9)²

Area of sector = 21.195 cm²

⇒ length of arc =  [θ/360]2πr

length of arc =  [30/360]2(3.14)(9)

length of arc =  4.71 cm

yo answer should be 6 if im not mistaken

step-by-step explanation:

a

step-by-step explanation:

the denominator cannot be the same as one of the factors.

8 denominator times 2 denominator = 16

and 7 numerator time 11 = 77

77/16= 77/16 ( they cannot be further simplified)