Question

type the correct answer in the box. spell all words correctly. consider the terms pyramid, line, square, and triangle. the term
is not defined in euclidean geometry.

Explanation:

In Euclidean geometry, a line is a basic undefined term (or defined using intuition), a square is defined using lines and angles, a triangle is defined using lines and angles, but a pyramid is a three - dimensional solid figure and is not a basic term defined in the initial Euclidean geometry (which mainly deals with plane figures and basic geometric entities like points, lines, planes at the start, and then builds up to plane figures like triangles, squares). So we identify that pyramid is the term not defined in the basic Euclidean geometry among the given terms.

Answer:

pyramid