Usually the ascendant influences the physical appearance more dominantly so you may be able to guess that using physical traits and not the sun sign (which is the typical zodiac determined by your birth date alone).
Astrologically masculine qualities: Independence, dating a lot, they may come off as rude to those that don’t understand them but in reality they just stand up for what they think is right, traveling a lot, and preferring to pursue people; being energetic, active, headstrong, talkative, confident, open-minded, sexual, and flirtatious. Astrologically feminine qualities: Preferring long-term relationships, preferring to stay at home, needing more sleep, and preferring to be pursued; being methodical, considerate, reliable, kind, stubborn, polite, and shy.
For example, Aries’ first reaction when faced with conflict is to yell or threaten, Gemini will talk his/her way out of it, Cancer usually responds with an emotional outburst, Taurus responds to conflict with silence and a posture of strength, etc. Cardinal (Aries, Cancer, Libra, Capricorn): These people usually responds to conflict with a bold, decisive, instinctive action in an attempt to trump the assault. They are easily motivated to start tasks. Fixed (Taurus, Leo, Scorpio, Aquarius): These people tend to hold in their reaction and respond that the attempt to hurt them was futile, with passive aggressive behavior or with silence. They concentrate on finishing things well. Mutable (Gemini, Virgo, Sagittarius, Pisces): These people tend to be artful with conflicts, and are known to try to avoid arguments. They are good at motivating people.