Library / /147 of 413

, 2007

Geometry Difficulty 1.0 Junior Find the answer Canada

When the radius of a circle is tripled, how are the area and circumference of the circle affected?

(A) The area is 9 times as large and the circumference is 3 times as large. (B) The area is 3 times as large and the circumference is 9 times as large. (C) The area is 3 times as large and the circumference is 6 times as large. (D) The area is 6 times as large and the circumference is 3 times as large. (E) The area is 3 times as large and the circumference is 3 times as large.

Want a route through all this instead of an archive? The track puts 2,604 problems in a working order, from Junior Challenge level to the IMO shortlist.

Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.