Add Yahoo as a preferred source to see more of our stories on Google. The nine rectangles A, B, C, D, E, F, G, H and I overlap one another. Rectangle A intersects ...

Well, what is the best way to cut a sandwich in half? Surely triangles don't really have "more sandwich," right? That's geometry and the law of conservation of matter. But something about the ...

Adjust the colors to reduce glare and give your eyes a break. Use one of the services below to sign in to PBS: You've just tried to add this video to My List. But first, we need you to sign in to PBS ...

Today’s two questions test your geometrical smarts. The first is about a triangle, the second about a square. 1. Tricky triangle This one was sent in by a reader, aged 85, who first saw it in 1960. He ...

Label the rectangles correctly with the letters A to I. Show puzzle solution Only the four blue-shaded rectangles below intersect three other rectangles, and therefore they must be F, G, H and I. H ...