Angles
This angle is smaller than 90°.
What is an acute angle?
These lines never cross and stay the same distance apart.
What are parallel lines?
We use this tool to measure angles.
What is a protractor?
A quarter turn equals this many degrees.
What is 90°?
The point where two rays meet is called this.
What is a vertex?
This angle is exactly 90°.
What is a right angle?
These lines cross to make four right angles.
What are perpendicular lines?
A right angle measures this many degrees.
What is 90°?
A half turn equals this many degrees.
What is 180°?
Parallel lines will eventually cross.
What is False?
This angle is greater than 90° but less than 180°.
What is an obtuse angle?
A line that has two endpoints is called this.
What is a line segment?
If an angle measures 45°, it is this type of angle.
What is an acute angle?
Three quarter turns equals this many degrees.
What is 270°?
This shape always has 4 right angles and 2 pairs of parallel sides.
What is a rectangle?
This angle measures exactly 180°.
What is a straight angle?
A line with arrows on both ends is called this.
What is a line?
If an angle measures 120°, it is this type of angle.
What is an obtuse angle?
A full turn equals this many degrees.
What is 360°?
An angle that measures less than 90° could measure this.
What is 60°? (or any acute angle measure)
An angle that goes all the way around measures this many degrees.
What is 360°?
A line with one endpoint and one arrow is called this.
What is a ray?
When reading a protractor, you should start at this number.
What is 0°?
If you turn from north to east, you made this type of turn.
What is a quarter turn?
Name the type of lines shown in the letter “H.”
What are perpendicular lines?