Semester Review- Adjacent, Vertical, Comp, Supplementary Angles

Front

What are adjacent angles?

Back

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

Front

Define vertical angles.

Back

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

Front

What are complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

If m∠1 = 30°, what is m∠3 if they are vertical angles?

Back

m∠3 = 30° (Vertical angles are equal).

Front

Give an example of a pair of complementary angles.

Back

81° and 9° are complementary angles because they add up to 90°.

Front

If two angles are supplementary and one angle measures 70°, what is the measure of the other angle?

Back

The other angle measures 110° (180° - 70° = 110°).

Front

What is the relationship between two angles that add up to 180°?

Back

They are supplementary angles.

Front

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

Back

Their measures are equal.

Front

What is the sum of the measures of complementary angles?

Back

The sum is 90 degrees.