Since a circle has 360 degrees, a compass has 360 degrees, too.
North is at 0 degrees.
The cardinal points divide the circle into 4 equal parts.
360 divided by 4 = 90, so the cardinal points are 90 degrees apart.
The intercardinal points mark the midway point between the cardinal points.
90 divided by 2 = 45
NE = 45SE = 135SW = 225NW = 315
Note that the cardinal points are also 90 degrees apart, because there are four of them.
The secondary intercardinal points mark the midway points between the cardinal points and intercardinal points.
- The cardinal and intercardinal points are separated by 45 degrees.
- 45 divided by 2 = 22.5
- NNE = 22.5
- ENE = 67.5
- ESE = 112.5
- SSE = 157.5
- SSW = 202.5
- WSW = 247.5
- WNW = 292.5
- NNW = 337.5
Note that the secondary intercardinal points are 45 degrees apart because there are 8 of them.
You could of course work out that each point is separated by 22,5 degrees, and just work your way round the points adding 22.5 to each. How you got the answer is not very important. It is important that you got it right!