双曲几何

双 = 又 : Sheldon shrimp is dual wielding boxing gloves in front of the anglepod.

双 = 又 : Sheldon shrimp is dual wielding boxing gloves in front of the anglepod.

曲 = 囗 + 卄 : Mnemonic symbol: a harp. Cupid (qu) is playing a harp (曲) in the space station's living room (Ø3). He's sitting on a big enclosure (囗), playing the harp (曲) and wielding a double axe (卄) at the same time.

Joan of Arc (ji) is sitting at a small table (几) in front of the space station (Ø1) and reading her Bible, waiting for a message from God.

何 = 亻 + 可 : Mnemonic symbol (from "carry"): baby sling

何 = 亻 + 可 : In the elevator's kitchen, Rosa Luxemburg picks up the crying baby Hamlet from his bed of nails, puts him in his baby sling and tries to calm him down.