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the diameter of a can is 20 centimeters. how big is the area covered where the can stands?

Sagot :

Answer:

Explanation:

First, observe the formula for calculating the area of a circle:

A

=

π

r

2

Where:

A

is the area of the circle

π

is the irrational number

3.14159

...

r 2

is the square of the radius of the circle.

Since the radius is half of the diameter:

r = d 2

⇒20 2

⇒ 10

∴ r 2= 10 2=100

Returning to our original equation:

A=100π = 314.16 cm 2 to 5