Welcome to The Riddler. Every week, I offer up problems related to the things we hold dear around here: math, logic and probability. Two puzzles are presented each week: the Riddler Express for those ...

Tonight, the waning gibbous moon will be near Jupiter and Gemini's brightest star, Pollux, to form an isosceles triangle with ...

Three lines of symmetry on an equilateral triangle. Right-angled triangles follow the same rules as other triangles. It's not the right angle that matters but whether the triangle is scalene or ...

A triangle is a polygon. It is a closed 3-sided shape made up of straight lines. The ‘tri-’ part of the word triangle means three. A triangle has 3 sides and 3 angles. Interior angles are the angles ...

Cate and Ryan got married to conclude season one of Life Unexpected. So any problems between these two and Baze are over with, right? Wrong! “Just because [Cate] married [Ryan] doesn’t mean she ...