Introduction to Geometry

What is a line segment?

• A line that extends infinitely in both directions.

• A part of a line that has two endpoints.

• A line that curves and does not have endpoints.

• A line that is only vertical.

How many line segments are in a pentagon?

• 3

• 4

• 5

• 6

What is a ray?

• A ray is a part of a line that starts at a point and extends infinitely in one direction.

• A ray is a line that has two endpoints.

• A ray is a straight line that curves at one end.

• A ray is a segment of a circle that connects two points.

What is a circumference?

• The distance around a circle.

• The area of a circle.

• The diameter of a circle.

• The radius of a circle.

What is a parallel line?

• Lines that intersect at a right angle.

• Lines that never intersect and are always the same distance apart.

• Lines that meet at a point.

• Lines that are curved and do not follow a straight path.

What is a line?

• A line is a straight path of points that goes on and on in two directions.

• A line is a curved path that bends in one direction.

• A line is a series of connected points that form a shape.

• A line is a point that has no length or width.

Give an example of coplanar points.

• A, F, E

• B, C, D

• X, Y, Z

• 1, 2, 3

What are coplanar points?

• Points that lie on different planes.

• Points that lie on the same line.

• Points that lie on the same plane.

• Points that are equidistant from a single point.

What is the difference between a line and a line segment?

• A line has two endpoints, while a line segment extends infinitely in both directions.

• A line extends infinitely in both directions, while a line segment has two endpoints.

• A line is always straight, while a line segment can be curved.

• A line segment is longer than a line.

What is the sum of the interior angles of a triangle?

• 90 degrees

• 180 degrees

• 360 degrees

• 120 degrees