Lines or Not
This figure is a straight path of points that goes on without end in both directions.
Line
This angle measures 90 degrees.
Right angle
The sum of these angles equals 90 degrees.
Complementary
How many degrees are in a circle?
360 degrees
This figure is part of a line that includes two endpoints.
line segment
This angle measures less than 90 degrees.
Acute angle
The sum of these angles equal 180 degrees.
Supplementary
How many degrees make up a quarter turn of a circle?
90 degrees
This figure is a part of a line that has one endpoint and goes on without end in one direction.
ray
This angle measures greater than 90 degrees.
Obtuse angle
When added together, the sum of the measures of these two smaller angles equals the measure of the larger angle.
How many degrees make up a half turn of a circle?
180 degrees
These lines never intersect.
Parallel
This angle measures 180 degrees.
Straight angle
The sum of two angles equals 120 degrees. What kind of angles are they?
Adjacent
How many degrees are in a full turn of a circle?
360 degrees
These lines intersect to form four right angles.
Perpendicular
What kind of angle would a 140 degree angle be?
Obtuse
An angle is made up of two smaller angles. The smaller angles measure 27 degrees and 63 degrees. What is the sum of these angles? What type of angles are they?
90 degrees
Complementary
How many 1-degree turns are in a quarter turn of a circle?
90 degrees