Special 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.

Tags

CCSS.7.G.B.5

Front

What is the measure of angle 4 if angle 1 = 27°?

Back

Angle 4 = 27° (because they are vertical angles).

Tags

CCSS.7.G.B.5

Front

What are corresponding angles?

Back

Corresponding angles are the angles that are in the same position at each intersection where a straight line crosses two others. They are equal when the lines are parallel.

Tags

CCSS.8.G.A.5

Front

If angle 1 = 27° and angle 5 is a corresponding angle, what is the measure of angle 5?

Back

Angle 5 = 27°.

Tags

CCSS.8.G.A.5

Front

What are supplementary angles?

Back

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

Tags

CCSS.7.G.B.5

Front

Which of the following is NOT an example of supplementary angles: ∠2 and ∠3, ∠1 and ∠7, ∠6 and ∠4?

Back

∠2 and ∠3 (if they do not add up to 180°).

Tags

CCSS.7.G.B.5

Front

What is the relationship between alternate interior angles when two parallel lines are crossed by a transversal?

Back

Alternate interior angles are equal.

Tags

CCSS.8.G.A.5

Front

If angle 6 and angle 7 are vertical angles, what can we say about their measures?

Back

Angle 6 = Angle 7.

Tags

CCSS.7.G.B.5

Front

What is the sum of the measures of two complementary angles?

Back

The sum is 90°.

Tags

CCSS.7.G.B.5

Front

If angle 1 = 27° and angle 2 is its complement, what is the measure of angle 2?

Back

Angle 2 = 63° (because 90° - 27° = 63°).

Tags

CCSS.7.G.B.5