Urgent help! Area of sector (1 Viewer)

[Freeba]

I have a question with a a sector with r radius, theta degrees....I need to find the perimeter.....anyone know the formula....is it 2r+((theta/2pi) x 2pir)?

 

[minijumbuk]

yup

remember to convert theta into radians though

 

[Freeba]

Do you have to?.....thanks

 

[lsam]

I have a question with a a sector with r radius, theta degrees....I need to find the perimeter.....anyone know the formula....is it 2r+((theta/2pi) x 2pir)?

A = 1/2.r^2.@ (in radian)

 

[Freeba]

I know the formula for are lol, need the perimeter!

 

[PC]

I have a question with a a sector with r radius, theta degrees....I need to find the perimeter.....anyone know the formula....is it 2r+((theta/2pi) x 2pir)?

Yes, provided that theta is in degrees.

 

[minijumbuk]

Yes, provided that theta is in degrees.

Radians, not degrees, because 2pi is in radians.

To convert degrees into radians, multiply your degree by pi/180