4. In geometry there are undefined terms that can be in the definition of every geometry term. Select all that apply: a. Radius b. Point c. Line d. Angle e. Plane

## Step 1<br />In geometry, there are certain terms that are not defined but are understood intuitively. These are known as undefined terms. They are the basic building blocks of geometry and are used to define all other terms.<br /><br />## Step 2<br />The undefined terms in geometry are point, line, and plane. These terms are not defined but are understood intuitively.<br /><br />## Step 3<br />The terms radius, angle, and line are defined using the undefined terms. For example, a radius is defined as a line segment from the center of a circle to any point on the circle. An angle is defined as the space between two lines that meet at a point. A line is defined as a straight path that extends infinitely in both directions.