Points a and b lie on a circle centered at point o. if length of ab/radius= π/10, what is the ratio of the area of sector aob to the area of the circle?

a. 1/10

b. π/10

c. 1/20

d. π/20

C. \frac{1}{20}

Step-by-step explanation:

Given: Points A and B lie on a circle centered at point O.

We know that the angle of sector is given by :-

, where l is the length of sector and r is the radius of sector.

Thus,

The area of sector is given by :-

Now, the ratio of the area of sector AOB to the area of the circle is given by :-

then, the surface area of the sphere shown in the image is: 256π sq. units!

step-by-step explanation:

the lateral surface area of a sphere is 2πrh where h=2r.

then:

surface area = 4πr^2.

in this case, r=8 units ⇒ surface area = 4π(8 units)^2. = 256π sq. units!

then, the surface area of the sphere shown in the image is: 256π sq. units!

step-by-step explanation:

mean or average is 40.6