PracticeQuiz content is free on an ad-supported model.

Unfortunately, we can't support ad blocker usage because of the impact on our servers. If you'd like to continue, please disable your ad blocker and reload page.

Reload page

SAT Math

Category - Geometry and Measurement

Start a Study Session Sign up for Question of the Day

If the radius of a circle is doubled, how many times is the area increased?

Explanation

Answer: C - The radius of a circle is increased 4 times. Denote the radius of a circle with r, the area of circle with A, a doubled radius with r₁ and the new area of circle with A₁.
r₁=2r
A₁= r₁² π = (2r)² π = 4r² π = 4A

Previous Next

Was this helpful? Upvote!

Start a Study Session Sign up for Question of the Day

SAT Math

Top questions

Related questions

Most popular on PracticeQuiz

Ad-Blocker not supported

SAT Math

Top questions

Related questions

Most popular on PracticeQuiz