>How is a Libra considered a masculine sign when their ruler is Venus?
There is an alternative way of deeming the genders of the zodiac signs, and this alternative system is based on the symbols themselves - and logic. The logic is that two opposing signs should have different genders, because they are the natural partnership signs.
Aries is ruled by Mars - the symbol of masculinity - while Libra is ruled by Venus - the symbol of femininity. Furthermore a ram is a very masculine symbol. So, Aries is masculine, and Libra is feminine.
A bull is a very masculine symbol - so Taurus must be masculine. No, Taurus is not ruled by Venus - Taurus is ruled by Eris, which was discovered in 2005. As a logical consequence the opposing sign, Scorpio, is feminine. No, Scorpio is not ruled by Mars, Scorpio is ruled by Pluto, which was discovered in 1930.
Gemini is opposing Sagittarius, which is usually depicted as a stallion, not a mare. So, Gemini is feminine, while Sagittarius is masculine.
Cancer is the sign of motherhood, while Capricorn, the sign of fatherhood, is depicted as a male goat. So, Cancer is feminine and Capricorn is masculine.
Leo is clearly a masculine symbol and hence a masculine sign - and as a logical consequence the opposing sign, Aquarius, is a feminine sign.
Virgo is clearly a feminine symbol and hence a feminine sign - and as a logical consequence the opposing sign, Pisces, is a masculine sign.