Identify acute, obtuse, straight, reflex and right angles - High school Geometry Exercises

Determine whether the represented angles are acute, obtuse, straight, right or reflex.

This angle is right.

This angle is obtuse.

This angle is straight.

This angle is acute.

Recall that:

\widehat{A} is acute if \widehat{A} \lt 90^\circ
\widehat{A} is a right angle if \widehat{A} = 90^\circ
\widehat{A} is obtuse if 90^\circ \lt \widehat{A} \lt 180^\circ
\widehat{A} is a straight angle if \widehat{A} = 180^\circ
\widehat{A} is a reflex if 180 \lt \widehat{A} \lt 360

The angle is obtuse.

This angle is straight.

This angle is acute.

This angle is right.

This angle is obtuse.

Recall that:

\widehat{A} is acute if \widehat{A} \lt 90^\circ
\widehat{A} is a right angle if \widehat{A} = 90^\circ
\widehat{A} is obtuse if 90^\circ \lt \widehat{A} \lt 180^\circ
\widehat{A} is a straight angle if \widehat{A} = 180^\circ
\widehat{A} is a reflex if 180 \lt \widehat{A} \lt 360

The angle is acute.

This angle is acute.

This angle is right.

This angle is straight.

This angle is obtuse.

Recall that:

\widehat{A} is acute if \widehat{A} \lt 90^\circ
\widehat{A} is a right angle if \widehat{A} = 90^\circ
\widehat{A} is obtuse if 90^\circ \lt \widehat{A} \lt 180^\circ
\widehat{A} is a straight angle if \widehat{A} = 180^\circ
\widehat{A} is a reflex if 180 \lt \widehat{A} \lt 360

The angle is right.

The angle is reflex.

This angle is acute.

This angle is obtuse.

This angle is right.

Recall that:

\widehat{A} is acute if \widehat{A} \lt 90^\circ
\widehat{A} is a right angle if \widehat{A} = 90^\circ
\widehat{A} is obtuse if 90^\circ \lt \widehat{A} \lt 180^\circ
\widehat{A} is a straight angle if \widehat{A} = 180^\circ
\widehat{A} is a reflex if 180 \lt \widehat{A} \lt 360

The angle is reflex.

This angle is acute.

This angle is right.

This angle is obtuse.

This angle is straight.

Recall that:

\widehat{A} is acute if \widehat{A} \lt 90^\circ
\widehat{A} is a right angle if \widehat{A} = 90^\circ
\widehat{A} is obtuse if 90^\circ \lt \widehat{A} \lt 180^\circ
\widehat{A} is a straight angle if \widehat{A} = 180^\circ
\widehat{A} is a reflex if 180 \lt \widehat{A} \lt 360

The angle is straight.

This angle is acute.

This angle is straight.

This angle is right.

This angle is obtuse.

Recall that:

\widehat{A} is acute if \widehat{A} \lt 90^\circ
\widehat{A} is a right angle if \widehat{A} = 90^\circ
\widehat{A} is obtuse if 90^\circ \lt \widehat{A} \lt 180^\circ
\widehat{A} is a straight angle if \widehat{A} = 180^\circ
\widehat{A} is a reflex if 180 \lt \widehat{A} \lt 360

The angle is obtuse.

This angle is acute.

This angle is straight.

This angle is obtuse.

This angle is right.

Recall that:

\widehat{A} is acute if \widehat{A} \lt 90^\circ
\widehat{A} is a right angle if \widehat{A} = 90^\circ
\widehat{A} is obtuse if 90^\circ \lt \widehat{A} \lt 180^\circ
\widehat{A} is a straight angle if \widehat{A} = 180^\circ
\widehat{A} is a reflex if 180 \lt \widehat{A} \lt 360

The angle is acute.