Question

Can someone help me plsea and i mean if its right what i wrote?

Answer 1

Area = 201.1

Cicumference = 50.27

Your answers are correct

Explanation:

A = Area = ?

C = Circumference = ?

SInce both the "Area" and "Circumference" are unknown, we use the formula:

`\mathrm{A = ( 1 )/( 4 ) \pi { d }^( 2 )}`

Remember that:

The diameter is the length of the line through the center

and

The radius is half the diameter

Given:

Diameter = 16

Now we substitute "16" for "d" into the formula and solve

`\mathrm{A = ( 1 )/( 4 ) \pi {( 16) }^( 2 )}`

Calculate 16 to the power of 2 and get 256

`\mathrm{A = ( 1 )/( 4 ) \pi * 256}`

Multiply
`(1)/(4)` and 256 to get
`(256)/(4)`

`\mathrm{A = ( 256 )/( 4 ) \pi}`

Divide 256 by 4 to get 64

`\mathrm{A=64\pi }`

Multiply 64 and π to get 201.06192983

`\mathrm{A=201.06192983}`

Round to the nearest tenth and get 201.1

`\mathrm{A=201.1}`

Next we need to find the "Circumference"

Formula for finding circumference is:

C = πd

Given:

Diameter = 16

Now we substitute "16" for "d" into the formula and solve

C = π(16)

Multiply 16 and π to get 50.265482457

C = 50.265482457

Round to the nearest hundreth and get 50.27

C = 50.27

So, your answers are correct.

The only mistake that could happen is whether you need to round to the nearest hundreth or tenth.