Support SSIR’s coverage of cross-sector solutions to global challenges. Help us further the reach of innovative ideas. Donate today. Read more stories by Ken Pucker. Ken Pucker is a professor of the ...

Or is it? Illustration by frankie's, Shutterstock You may have heard the saying, “you can’t square a circle”, which is essentially metaphor for trying to do the impossible. Yet, world ...

Substitute the value of the radius into the formula for the area of a circle. Multiply π by the square of the radius. This is the same as π × 𝒓 × 𝒓. The formula for the area of a circle ...