Shape SQUAD: The Circle-est of Them All

Welcome, Circle Enthusiasts, to the most circular of our Shape SQUAD subpages!

Diameter Practice | Eclipse, Oblate and Ellipses, Oh My! | Circle, Circle, Circle, in the Mandelbrot Set | Circle Mandala: Where Art Meets Math

Circle-related Fun Facts:

Circles have 0 area! Just kidding, they have πr^2.
Circles are the only shape that can fit any other shape inside them.
Circles are the result of a circle of trust with a circle of friends.

Circle-related Quizzes:

Circle Quiz: How Well Do You Know Your Circles?

A Circle in the Hand:

Because you asked for it, here's a random circle:

Or, if you will, a circle in the hand:

Or, a hand holding a circle in the circle:

Or, a circle holding a hand in the hand: