How can we help?

You can also find more resources in our Help Center.

Lines and angles

STUDY
PLAY
A full circle
equal 360 degrees
Angles around a point
Angles that add up to 360 degrees.
Acute angles
angles that are less than 90 degrees
Right angles
angles that measure 90 degrees
Obtuse angles
angles that measure greater than 90 degrees and less than 180 degrees
Straight angles
measures 180 degrees
Two angles
supplementary angles
Two angles that add up to 90 degrees
Complimentary Angles
A reflects angle
measure greater than 180
Vertically opposite angles
These are equal angles, formed when two straight lines intersect.
A capital 'L' with a small box in the Corner
Is a right angle
Angles in matching corners
corresponding angles and they are equal in measure
A full triangle
is equal to 180
Base angles
are equal in measure