Best Answer

The formula for the circumference of a circle is 2(pi)r = C
twice the radius times (pi).
If you double the radius, you double the circumference.
Example:
r=1, circumference = 2(pi)
r=2, circumference = 2(pi)*2=4(pi)
r=4, circumference = 2(pi)*4=8(pi)

Compliments from

from

2 years ago

All Answers

Dear friend 1) Circumference of a circle is 2Pir so when r is doubled r=2r

so circumfernce, S= 2pi.2r

=4pir

so circumfernce will double

2) similarly area =4pir^2

Source(s):

senior mathematics teacher

http://answers.yahoo.com/question/index?...
Compliments from

Compliments from

Compliments from

Related Questions

2 Answers

11 Answers

1 Answer

7 Answers

2 Answers

Answered

1 Compliment

4 Answers

3K Views

demon
Level 46 Grad School

Create a FREE Askpedia Account to Answer the Question

You are now logged in via Facebook. Please Choose a Username for Askpedia

Choose your Askpedia Username

Question > Flag Question as Inappropriate

Found an Inappropriate Question? Flag it for Removal after Editorial Review

Loading...

You have already flagged this question for the following reason:

Question > Award Question Reward: Points

Found a Great Answer? Select Answer as Best Answer and Award Question Reward

Best Answer Award Comments (Optional)

The formula for the circumference of a circle is 2(pi)r = C
twice the radius times (pi).
If you double the radius, you double the circumference.
Example:
r=1, circumference = 2(pi)
r=2, circumference = 2(pi)*2=4(pi)
r=4, circumference = 2(pi)*4=8(pi)

Question > Compliment Question

Found a Great Question? Show your appreciation by Complimenting the Question

Loading...

You have already Complimented this Question

Question > Answer > Compliment Answer

Found a Great Answer? Show your appreciation by Complimenting the Answer

Loading...

You have already Complimented this Answer

From