Angles Intro

What are parallel lines?

• Lines that intersect at a right angle

• Lines that will never cross, even if extended forever

• Lines that intersect to form acute angles

• Lines that are perpendicular to each other

What is formed when two lines intersect?

• A parallel line

• A circle

• An arc

• Angles

What symbol is used to represent an angle?

• A circle

• A special angle symbol

• A small square

• An arc

What are perpendicular lines?

• Lines that never intersect

• Lines that are parallel to each other

• Lines that form square corners when they intersect

• Lines that form acute angles

What is a right angle?

• An angle that is exactly 180 degrees

• An angle formed by perpendicular lines

• An angle that is less than an acute angle

• An angle greater than a straight angle

What is an acute angle?

• An angle that is less than a right angle

• An angle that is greater than a right angle

• An angle that forms a straight line

• An angle that is 180 degrees

What is an obtuse angle?

• An angle that is less than a right angle

• An angle that is greater than a right angle

• An angle that forms a straight line

• An angle that is exactly 90 degrees

What are complementary angles?

• Angles that combine to form a right angle

• Angles that are perpendicular to each other

• Angles that combine to form a straight angle

• Angles that are parallel to each other

What are supplementary angles?

• Angles that are parallel to each other

• Angles that combine to form a straight angle

• Angles that combine to form a right angle

• Angles that are perpendicular to each other

What is a straight angle?

• An angle that forms a circle

• An angle that is greater than a right angle

• An angle that looks like a straight line

• An angle that is less than a right angle