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Let us assume the front direction as North, back side as, South, Left side as West side and right side as East side.
We also know that, in East side, the sun rises and in West side it sets. If we look to the sun, then our front is in the East side and our backside is in the West side.
Correspondingly, our left will be in Northside and our right is in South side.
For solving these problems the foremost thing we need to remember is that every change in the direction of main side changes a 90 degree change.
For instance if a person moves from North side to Westside/Eastside there will be change in 90°. However the change among South and South east side or North and North-east will be 45° only.
For solving these types of problems, we presumed all these distances among the specified points and along with straight lines.
Pythagoras theorem concept is used to solve the problems like this.