Acute, Right and Obtuse Angles

angles that add up to 90 degrees

40 + 50 = 90

Hands on a clock that look like an obtuse angle

5:00

Hands on a clock that look like a right angle

9:00

An angle with a measure of 90 degrees

A 90 degree angle

A real life example of an obtuse angle

A fan

a real life example of right angle

A picture frame

180 degree straight angle

A straight line angle

a triangle with three acute angles

Acute triangle

An angle with a measure that is greater than 0 degrees, and less than 90 degrees

An acute angle

An angle that measures greater than 90 degrees but less than 180 degrees

An obtuse angle

a triangle with one obtuse angle

An obtuse triangle

a real life example of an acute angle

An open laptop lid

angles that add up to less than 90 degrees

Angle DBC + Angle CBA

Hands on a clock that look like an acute angle

1:00