Math CentralQuandaries & Queries


Question from Jonathan:

If a cone has an angle of 22 degrees, when i place it flat on a surface, the new resulting central angle is now at 68.69123834, but how come when i saw it on my friend it say 68 degree and 40 minutes, what is this minute?

Hi Jonathan,

Angles are sometimes measured in degrees, minutes and seconds. There are 60 minutes in a degree and 60 second in a minute. Hence 40 minutes is $\large \frac{40}{60} \normalsize = \large \frac{2}{3}$ of a degree.


About Math Central


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.
Quandaries & Queries page Home page University of Regina PIMS