File 2 - Grade 6 Math Practice Exam

Which of the following has one endpoint and extends infinitely in one direction?

• Line

• Ray

• Line Segment

• Point

Answer explanation

A ray has one endpoint and extends infinitely in one direction, making it the correct choice. In contrast, a line extends infinitely in both directions, a line segment has two endpoints, and a point has no length.

A line is different from a ray because:

• A line has two endpoints, while a ray has only one

• A line extends infinitely in both directions, while a ray extends infinitely in one direction

• A line stops at a point, while a ray does not

• A line is shorter than a ray

Answer explanation

A line extends infinitely in both directions, while a ray has one endpoint and extends infinitely in one direction. This distinction is key in understanding their definitions in geometry.

What do we call a part of a line that has two endpoints?

• Ray

• Line

• Line Segment

• Point

Answer explanation

A line segment is defined as a part of a line that has two distinct endpoints. Unlike a ray or a line, which extend infinitely, a line segment is finite and clearly defined by its endpoints.

If two lines never meet no matter how far they are extended, they are called:

• Perpendicular lines

• Intersecting lines

• Parallel lines

• Diagonal lines

Answer explanation

Two lines that never meet, regardless of how far they are extended, are defined as parallel lines. This distinguishes them from perpendicular, intersecting, and diagonal lines, which either meet or cross each other.

A point represents:

• A location in space

• A direction

• A moving object

• A type of line

Answer explanation

A point is defined as a specific location in space with no dimensions. It does not represent a direction, a moving object, or a type of line, making "A location in space" the correct choice.

How many endpoints does a line segment have?

• 0

• 1

• 2

• Infinite

Answer explanation

A line segment has two endpoints, which are the points at either end of the segment. Therefore, the correct answer is 2.

Two lines that cross each other at a 90-degree angle are called:

• Parallel lines

• Perpendicular lines

• Skew lines

• Diagonal lines

Answer explanation

Two lines that cross each other at a 90-degree angle are known as perpendicular lines. This term specifically describes the relationship between the two lines, distinguishing them from parallel, skew, or diagonal lines.

Which of these symbols is used to represent a line in geometry?

• →

• ↔

• -

• °

Answer explanation

In geometry, a line is represented by the symbol ↔, which indicates a line that extends infinitely in both directions. The other symbols represent different concepts: → indicates a ray, - indicates a line segment, and ° denotes degrees.

What do we call two lines that cross at one point?

• Parallel lines

• Perpendicular lines

• Intersecting lines

• Line segments

Answer explanation

Two lines that cross at one point are called intersecting lines. This distinguishes them from parallel lines, which never meet, and perpendicular lines, which intersect at a right angle.

A straight path that extends infinitely in two directions is called a:

• Ray

• Line Segment

• Line

• Point

Answer explanation

A straight path that extends infinitely in two directions is defined as a line. Unlike a ray, which has a starting point and extends infinitely in one direction, or a line segment, which has two endpoints, a line has no endpoints.