The 70/110/180 rule — visualized.
Sectors per FAA AIM 5-3-8. Look up the radial you're on (= heading + 180°) relative to the inbound course. Inbound arrow points toward the fix.
PARALLEL — radials 0° to 110° CW of inbound (110° wedge). Cross fix, turn opposite-of-hold to outbound heading on non-holding side, fly 1 min, then 180°+ turn back through inbound course.
DIRECT — radials 110° to 290° CW of inbound (180° wedge). Cross fix and simply turn to follow the holding pattern.
TEARDROP — radials 290° to 360° CW of inbound (70° wedge). Cross fix, fly outbound at 30° offset toward holding side for 1 min, then turn in hold direction to intercept inbound.
Non-standard (left-turn) holds: mirror everything across the inbound course line.