classify angles, vertical and adjacent angles

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal in measure.

Front

Which angles are considered adjacent angles?

Back

Adjacent angles are two angles that share a common side and a common vertex but do not overlap.

Front

Identify a pair of vertical angles from the following: ∠COB & ∠COA, ∠AOD & ∠AOC, ∠COB & ∠AOD, ∠BOD & ∠AOD.

Back

∠COB & ∠AOD.

Front

Identify a pair of adjacent angles from the following: ∠COB & ∠DOA, ∠AOD & ∠AOC, ∠COB & ∠AOD, ∠BOD & ∠AOC.

Back

∠AOD & ∠AOC.

Front

What is the measure of an obtuse angle?

Back

An obtuse angle measures more than 90 degrees but less than 180 degrees.

Front

What is the measure of a right angle?

Back

A right angle measures exactly 90 degrees.

Front

What is the measure of an acute angle?

Back

An acute angle measures less than 90 degrees.

Front

What is the measure of a straight angle?

Back

A straight angle measures exactly 180 degrees.

Front

If two angles are vertical, what can we say about their measures?

Back

The measures of vertical angles are equal.

Front

If two angles are adjacent, what can we say about their position?

Back

Adjacent angles share a common vertex and a common side.