1# compass-angle 2 3Because of the extensive historical use of compass heading names 4like "north" and "se" (short for "south-east") in PIC and Pikchr, 5it makes sense that angles should be specified according to compass 6degrees. North is 0° and the angle increases clockwise so that 7east is 90°, south is 180°, west is 270° and 360° is 8back to north again. 9 10~~~ pikchr 11C: dot 12arrow up from C; text " 0°" 13arrow right from C; text " 90°" rjust 14arrow down from C; text "180°" below 15arrow left from C; text "270° " ljust 16~~~ 17 18Even though heading angles are specified in degrees, the arguments 19to the built-in "sin()" and "cos()" functions are in radians. 20