# Featured

## Euler’s Theorem Convex Polyhedra Vertices + Faces — Edges = 2

While studying building solids with triangles, rectangles, pentagons, and hexagons, I tried to follow the Four Color Map Theorem and found that it worked for convex polyhedra. What is polyhedra? A polyhedron is a solid with flat faces (poly means many, and hedron means faces).

## Four Color Map Theorem Creates New Branch of Mathematics: Graph Theory

Francis Guthrie, a 21 year old mathematics student at University College in London, was mapping the counties of England in 1852 when he noticed that he only needed four colors for the map.

## Adjacent Borders, Countries with Most, All US States, Mean and Mean Absolute Deviation

LIST THE NUMBER OF US STATES ADJACENT TO EACH US STATE (circle the number)

## Sports Field/Court/Rink Dimensions -- Architectural Drawings To Scale

After last week exploring the Major League Baseball Fields Dimensions, Outfield Square Footage and Homerun Distance, I received a lot of interest from the students to look at other sports fields dimensions.

## Major League Baseball Fields Dimensions, Outfield Sq. Ft., and Homerun Distance

We had a very big week updating last week’s lesson on the probability of choosing the right teams in the NCAA tournaments: