In its place I described a more interesting math problem ... In fact, there’s no notation at all, just a diagram and a question: How many triangles are formed by these six intersecting lines?

When the triangle has a right angle ... relationships from pretty much any area of math. "Some mathematicians have a talent for drawing beautiful diagrams by hand, but they vanish as soon as ...

Immersive Math ' is a free textbook site that makes ... linear algebra book with fully interactive illustrations.' The triangle diagram displayed in the center is interactive, and you can rotate ...

Save guides, add subjects and pick up where you left off with your BBC account. Problem 5 is all about triangles and figuring out how they fit together. Maths teacher Chris Smith and pupils from ...

But I want to label the sides of all of these triangles using a convention as shown in this diagram. So ... I measured the sides with a ruler—no math involved (yet). What would happen if ...

A bit of pen-and-paper math shows that, unfortunately, the diagonal’s length is too short for the edge of its equal-area triangle ... the matching-diagrams technique could unravel a slew ...