Which of the following is an undefined term in Mathematics?
ATriangle
BAngle
CCircle
DPlane
Answer:
D. Plane
Read Explanation:
Yes, Plane is an undefined term in mathematics.
In geometry, plane is considered one of the undefined terms along with other basic concepts such as point and line. These terms are fundamental to geometric theory but are not formally defined within the system; instead, they are understood intuitively.
A plane is typically described as a flat, two-dimensional surface that extends infinitely in all directions, but no formal definition is provided because it is treated as a basic building block in geometry from which other concepts are derived. The properties of a plane are used in further definitions and theorems in geometry.