Identify Angles: Right, Acute, & Obtuse

A right angle can be identified by its square corner, often marked with a small square.

A right angle is identified by its acute angle measurement.

A right angle is always larger than 90 degrees.

A right angle can be identified by its circular shape.

Obtuse angles are always less than right angles.

Obtuse angles are always equal to right angles.

Obtuse angles are always greater than right angles.

Obtuse angles and right angles are the same.

An angle that measures exactly 90 degrees.

An angle that measures exactly 45 degrees.

An angle that measures exactly 180 degrees.

An angle that measures less than 90 degrees.

Acute angles are always less than right angles.

Acute angles are equal to right angles.

Acute angles are greater than right angles.

Acute angles can be either less than or greater than right angles.

It is less than 90 degrees.

It is exactly 90 degrees.

It opens wider than a right angle.

It is equal to 180 degrees.

Acute triangle

Right triangle

Obtuse triangle

Equilateral triangle

Yes, an angle can be both acute and obtuse at the same time.

No, an angle cannot be both acute and obtuse at the same time.

An angle can be acute, obtuse, or right, but not both acute and obtuse.

An angle can be acute or obtuse, but not both simultaneously.

Acute triangle

Obtuse triangle

Right triangle

Scalene triangle

An angle that measures exactly 90 degrees.

An angle that measures more than 90 degrees.

An angle that measures less than 90 degrees.

An angle that measures exactly 45 degrees.

Acute angle

Right angle

Obtuse angle

Straight angle