Exploring the Basics of Geometry

Which of the following best describes a line in geometry?

• A line with no endpoints or arrows

• A line with two endpoints

• A line with one endpoint and one arrow

• A line with two arrows extending infinitely

How is a ray different from a line?

• A ray has two endpoints

• A ray has one endpoint and extends infinitely in one direction

• A ray has two arrows extending infinitely

• A ray has no endpoints or arrows

What is the measure of an acute angle?

• Exactly 90 degrees

• Between 0 and 90 degrees

• Between 90 and 180 degrees

• Exactly 180 degrees

Which angle has a measure of exactly 90 degrees?

• Obtuse angle

• Right angle

• Straight angle

• Acute angle

What does a midpoint do to a segment?

• Divides it into two unequal parts

• Extends it infinitely

• Marks the end of the segment

• Divides it into two equal parts

What is an angle bisector?

• A segment that extends infinitely

• A line that divides an angle into two unequal parts

• A ray that divides an angle into two equal parts

• A point that marks the end of an angle

What is true about parallel lines?

• They have different slopes

• They intersect at obtuse angles

• They never intersect and have the same slope

• They intersect at right angles

What is the sum of the measures of complementary angles?

• 90 degrees

• 180 degrees

• 360 degrees

• 45 degrees

What is a median in a triangle?

• A line segment that forms right angles

• A line segment that extends infinitely

• A line segment that bisects an angle

• A line segment from a vertex to the midpoint of the opposite side

Which postulate can be used to prove that two triangles are congruent if two angles and the included side are known?

• AAS Postulate

• ASA Postulate

• SAS Postulate

• SSS Postulate