Question

to o find the TSA of a quadrant of a sphere of radius 3.5cm​

Answer 1

Answer:

ANSWER

The surface area of a sphere of radius r is 4πr

2

. Half of this is 2πr

2

.

If you have a hemispherical object then it has a base which is a circle of radius r.

The area of a circle of radius r is πr

2

and thus if the hemisphere is meant to include the base then the surface area is 2πr

2

+πr

2

=3πr

2

.

Answer 2

Answer:

a quadrant can be written as half of a hemisphere

so,

CSA of quadrant=half the CSA of hemisphere

=2πr²×1÷2

πr²

quadrant also includes 2 circular bases

= πr² plus πr²

2πr²

total area (TSA)= adding all

3πr². substitute value of r