We’ve all done it. You pull up your vector editing tool, draw a perfect circle, another one inside the first one, cut the second one out, align the whole thing to the editor’s on-screen grid – so ...

A circle is inscribed within a right triangle. The circle is tangent to all three sides of the triangle. The area of the circle is exactly one half the total area of the triangle. Find the measure, in ...

"The more things change, the more they stay the same." At least, that's what the old adage tells us. Back in 1849, the French writer Jean-Baptiste Alphonse Karr wrote that saying about how people and ...

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 ...

At 13 years old, O’Dorney won the 80th Scripps National Spelling Bee and shook hands with then-President George W. Bush in the Oval Office. In 2011, O’Dorney met then-President Barack Obama, this time ...

Hannah Cairo is in the first year of her mathematics graduate program at the University of Maryland. Like her peers, she does research and is a TA on campus. But unlike most Ph.D. students, Cairo is ...

An airplane, traveling with a constant engine speed, makes a large and perfect circle parallel to the ground. There is no wind. Will it complete the same circle in greater, less or the same time if ...

Leonardo Da Vinci’s Vitruvian Man has been puzzling scholars for centuries. Da Vinci, who was not only a famous artist but also an inventor, engineer, and scientist studying subjects like human ...

Are you ready for this math riddle test? Okay, in today’s math riddle, a series of circle-based numbers is given, which is used as logical arithmetical reasoning to test your mental ability. So, can ...