If you are facing east and you turn clockwise 90 degrees, you would be facing south. This is because a full circle is 360 degrees, so turning 90 degrees from east would bring you to the next cardinal direction, which is south.
North East
South
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Unfortunately there is no consistent direction: it depends on the context. If dealing with bearings (eg navigation) North is 000 degrees and the angle is measured in the clockwise direction starting from the Northward direction. In the context of coordinate geometry, particularly if working with polar coordinates, angles are measured in the anti-clockwise direction, starting with the x-axis (pointing East) as 0 degrees. Generally speaking, though, angles may be measured in any direction.
South East
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North East
South
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north
East-facing azimuth = 90°Northwest-facing azimuth = 315°To turn from east-facing to northwest facing, you turn 225° to the right (clockwise).
As long as you are not standing on either the North or South Poles, the east would be to your right.
West
Southeast
You would be facing south west after turning right 225 degrees from facing north east.
90 degrees from North would be East, then another 45 degrees from that would bring it halfway to South. Therefore, 135 degrees clockwise from North is Southeast.
Use a compass to identify which direction is north. Face that direction, then turn ninety degrees to your right. You are facing east.