Where does “muistikolmio” come from?

muistikolmio (Finnish) comes from Finnish muisti, from Finnish muistaa, from Proto-Finnic muistadak, from Proto-Finno-Ugric muja- — to touch, feel.

muistikolmio (Finnish): one of the two right triangles one is supposed to memorize (the angles and lengths of lines of): a right triangle with side length 1 and both angles 45° (hypotenuse length √2) and a right triangle with side lengths 1 and √3, and angles 30° and 60° (hypotenuse length 2)

Definitions

  1. one of the two right triangles one is supposed to memorize (the angles and lengths of lines of): a right triangle with side length 1 and both angles 45° (hypotenuse length √2) and a right triangle with side lengths 1 and √3, and angles 30° and 60° (hypotenuse length 2)

Ancestry of “muistikolmio”, step by step

muistikolmio traces back through two separate lines of ancestry.

via Finnish muisti

StepLanguageWordMeaning
1Finnishmuistimemory; Third-person singular past form of...
2Finnishmuistaato remember, recall, recollect; Third-person...
3Proto-Finnicmuistadakto understand
4Proto-Finno-Ugricmuja-to touch, feel

via Finnish kolmio

StepLanguageWordMeaning
1Finnishkolmiotriangle; three-room apartment; give way sign,...
2Finnishkolmethree
3Finnishkolmitri-
4Proto-Uralic*kolme—
Every word from Proto-Finno-Ugric muja- →Every word from Proto-Finnic muistadak →Every word from Finnish muistaa →