When we look at a highway, we often think of it as a straight line. Of course it is not straightâ€”it curves with the earth. Still, if we say that the straight lines on the surface of the earth are the *great circles*, then we can begin to do geometry. Continue reading Spheres and geometry

# Category Archives: BMC Session

# Downtown walking distances

We began our second session by noticing that in a perfect city grid such as (some of) Boise’s downtown and north end, there are a lot of ways to get from point A to point B. So how many are there really? Continue reading Downtown walking distances

# Sona sand drawings

The Sona sand drawings are part of the oral tradition of the Tchokwe people of Angola. The drawings are both art and science, and hold many interesting mathematical properties. Continue reading Sona sand drawings