Are all coins (monetry) prisms?

Question:

Answer: No. A coin is usually a piece of hard material, generally metal, usually in the shape of a disk. A prism is prism (1.) A solid figure whose bases or ends have the same size and shape and are parallel to one another, and each of whose sides is a parallelogram. (2.) A transparent body of this form, often of glass and usually with triangular ends, used for separating white light passed through it into a spectrum or for reflecting beams of light. (3.) A cut-glass object, such as a pendant of a chandelier. (4.) A crystal form consisting of three or more similar faces parallel to a single axis. (5.) A medium that misrepresents whatever is seen through it. Guitar-shaped coins were once issued in Somalia. Poland once issued a fan-shaped 10 zloty coin. The oddest coin ever was the 2002 $10 coin from Nauru, a Europe-shaped coin. There have also been coins with holes in them, lion's heads and more.

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