Evan O’Dorney leaps from his seat and snatches the chalk from his teacher’s hand. “I think it goes like this,” the eighth-grader exclaims. He has come up with a formula for the number of ways to ...

Pi Day celebrated March 14 because American date format matches 3.14. It lives in geometry, trigonometry, probability, engineering, signal processing, quantum mechanics, and cosmology. A child meets ...

The circumference of a circle is the distance around the circle. It is another name for the perimeter of a circle. The circumference of a circle is calculated using the formula: \(\text{circumference} ...

On a recent Wednesday evening, 13 fifth- to ninth-grade students from around Marin County gathered in a Dominican University classroom for an after-school activity that didn’t involve sports or the ...

A red circle is inscribed inside a blue square. The arrangement leaves gaps in the square’s four corners, two of which are filled with smaller circles that just barely touch the big red circle and the ...