**Himanshi Verma**

The usual definition of pi is the ratio of the circumference of a **circle** to its diameter, so that the circumference of a **circle** is pi times the diameter, or 2 pi times the radius. ... This give a geometric justification that the **area** of a **circle** really is "pi r squared".

*-Answered by Himanshi Verma* On 02 February 2019:01:33:01 PM