Angles do not have a gender. If you really ponder, do they even need a gender? They are a creation from God to serve Him and protect us. They do not reproduce either.
Colossians 1:16 - "For by him were all things created, that are in heaven, and that are in earth, visible and invisible, whether [they be] thrones, or dominions, or principalities, or powers: all things were created by him, and for him"
Angels are not human; they are spirits that are not physical beings. In the Bible, angles do appear in the form of men, not women, only if God commands them to but they do not have human features such as feet and faces.