## Tags » Curvature

#### Measuring the (Non) Curvature of the Earth; Basic Spherical Geometry

## Ball Earth Curvature Chart

IF the earth is a globe, and is 25,000 English statute miles in circumference, the surface of all standing water must have a certain degree of convexity–every part must be an arc of a circle. 200 more words

#### Vertex of a parabola - language in math again

Here are some definitions of the vertex of a parabola.

One is complete garbage, one is correct though put rather chattily.

The rest are not definitions, though very popular (this is just a selection). 539 more words

#### Reading the Comics, June 11, 2015: Bonus Education Edition

The coming US summer vacation suggests Comic Strip Master Command will slow down production of mathematics-themed comic strips. But they haven’t quite yet. And this week I also found a couple comics that, while not about mathematics, amused me enough that I want to include them anyway. 553 more words

#### What you see, Is not what is

This is an excellent short video on mainstream news explaining what we see is really not what we are seeing…it’s all mirage folks.

If earth were a globe, we would only see the tops of the buildings as the remainder would be down below the horizon. 41 more words