Lines, Angles, and Triangles

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

• A line has a definite starting and ending point, while a line segment goes on forever.

• A line segment has a definite starting and ending point, while a line goes on forever.

• A line has arrows on both ends, while a line segment has arrows on one end.

• A line segment has arrows on both ends, while a line has no arrows.

Which of the following is true about a ray?

• It has a definite starting point and goes on forever in one direction.

• It has no definite starting point.

• It goes on forever in both directions.

• It has a definite starting and ending point.

What type of angle is formed when two rays meet at a 90° angle?

• Straight angle

• Obtuse angle

• Acute angle

• Right angle

Which type of triangle has all three angles less than 90°?

• Acute triangle

• Equilateral triangle

• Right triangle

• Obtuse triangle

What is the defining characteristic of a scalene triangle?

• It has one right angle.

• All sides are of equal length.

• All sides are of different lengths.

• Two sides are of equal length.