Happy Pi Day! Bake something awesome to celebrate this mathematical constant. A quick refresher: Pi is defined as the distance around a perfect circle, or the circumference, divided by the distance across it, or the diameter. It is also involved in calculating the area of a circle, the volume of a sphere, and many other mathematical formulas you might need in the sciences.

A peek inside the North America’s only Math Museum-now open in Madison Square.

MoMath replaces lectures and textbooks with more than 30 eclectic exhibits covering topics such as algebra and geometry. The museum, which is designed for visitors of all ages, aims to eliminate math’s intimidation factor and “show how everyone can experience and enjoy mathematical exploration at their own level,” according to hedge-funder–turned–executive director Glen Whitney. MoMath utilizes state-of-the-art technology to personalize each visit: Patrons’ ticket stubs are wirelessly tracked as they traverse the two-floor space, and exhibits adapt based on user preferences from the first few electronic displays.