Question

Which figures can be precisely defined by using only undefined terms? Check all that apply.

angle
arc
circle
line segment
parallel lines

Answer 1

We can define circle, line segment and parallel lines with the help of undefined terms.

Step-by-step explanation:

The undefined terms in geometry are:

In Geometry, we have several undefined terms: point, line and plane.

From these undefined terms we can define:

1)

Circle:

since a circle is a set of all points in a plane that are at a given distance from a given point, the center.

2)

Line segment:

In geometry, a line segment is a part of a line that is bounded by two distinct end points, and contains every point on the line between its endpoints.

3)

Parallel lines:

In geometry, parallel lines are lines in a plane which do not meet; that is, two lines in a plane that do not intersect or touch each other at any point are said to be parallel.

Answer 2

The correct answers are circle, line segment and parallel lines.

Step-by-step explanation:
The undefined terms of geometry are point, line and plane.

A circle is a set of points equidistant from a fixed point called the center; this uses no terms except the undefined terms.

A line segment is a part of a line with two distinct endpoints. Again, no terms used other than undefined terms.

Parallel lines are lines that never intersect; again, no terms other than undefined terms.