Real-Life Maths

Angle

City Planning

For safe traffic, street intersections are often made at right or obtuse angles. In this case, visibility is easier when turning. A sharp 60° turn is more prone to accidents because the turn is difficult. It would be easier for the driver if the road were constructed like the figure on the right, namely, having an additional intersection. That way, the car can first turn at 150°, and then at 90°.

A vehicle can turn easier with the restructured street design (right).

Parking spaces

Angles can determine the number of cars parking in a lot. Parking arrangements are often either perpendicular or angled. An advantage to the former case is that more cars can be fit in the parking lot. As for using obtuse-angled spaces, it would be easier for drivers to turn the car at an obtuse angle than a right angle, which also means that there will less accidents.

Set

Search Engines

Almost all search engines use a "Boolean conjunction" model.

If you search "interesting mathematics" in search engines, the search result will be the the pages simultaneously containing "interesting" and "mathematics".

[More applications later]