The Dimensions in Between The mathematics that we have learned since elementary school is a bit beautiful. A line is perfectly straight, the path of the ball thrown upward is a parabola and the shape of the earth we see in books is a sphere. The truth is, the lines, parabolas, and spheres are “flawless […]

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# College Geometry

## The Seven Bridges of Königsberg

The city of Königsberg, Prussia (now Kaliningrad, Russia) was set on both sides of the Pregel river. There were two islands on the river and there were seven bridges connecting them and the main land as shown in Figure 1. Residents observed that using the bridge at the southern part of the city (Bridge 1 […]

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