#jessdita

Shapes of Constant Width are extremely helpful in designing coins. They are distinct shapes that allow blind and partially sighted people to tell the difference between different denominations, but are still suitable to use in vending machines and slot machines because the diameter can be constantly measured in any orientation, and because they can roll easily (as demonstrated here).

This is why geometry is cool.

98 x 99 – (609 + 6969 + 111) = (111 + 6969 + 609) – 66 x 86

^ This equation reads the same if you read it upside down. 

Girl: i < 3 u

Guy: i < 3 u 2

The square root of (5 – 9/2)2  is ± (5 - 9/2). The above proof assumes the positive value, which is false in this instance. 

Using the negative value, the paradox disappears.