Angles
Angle ABC is an acute angle
Angle DEF is a right angle
Angle GHI is an obtuse angle
Angle JKL is a straight angle
Angle XYZ is a reflex angle
Angles NMO and PMO are complementary angles
Angles RQS and TQS are supplementary angles
Acute angle: an angle that measures less than 90 degrees. It looks like a sharp corner.
Right angle: an angle that measures exactly 90 degrees. It looks like an “L” shape.
Obtuse angle: an angle that measures more than 90 degrees but less than 180 degrees. It looks like an open corner.
Straight angle: an angle that measures exactly 180 degrees. It looks like a straight line.
Reflex angle: an angle that measures more than 180 degrees but less than 360 degrees. It looks like a full turn with some extra angle.
Complementary angles: two angles that add up to 90 degrees. They fit together to form a right angle.
Supplementary angles: two angles that add up to 180 degrees. They fit together to form a straight line.
