Geometry Proofs

What is the definition of parallel lines?

• Lines that never intersect

• Lines that are perpendicular to each other.

• Lines that intersect at multiple points.

• Lines that intersect at one point.

Tags

CCSS.HSG.CO.A.1

If two lines are perpendicular, what can you say about their slopes?

• The slopes are equal.

• The slopes are parallel.

• The slopes are positive reciprocals of each other.

• The slopes are opposite reciprocals of each other.

Tags

CCSS.HSG.GPE.B.5

What are vertical angles?

• Congruent angles formed opposite each other by the intersection of two lines.

• Angles formed by the intersection of two intersecting lines at a right angle.

• Angles formed by the intersection of two perpendicular lines.

• Angles formed by the intersection of two parallel lines.

Tags

CCSS.7.G.B.5

The Triangle Sum Theorem states that the angles in a triangle sum to __________.

• 90 degrees

• 270 degrees

• 360 degrees

• 180 degrees

Tags

CCSS.8.G.A.5

If two angles are supplementary, what can you say about their measures?

• Their measures add up to 180 degrees.

• Their measures are equal to each other.

• Their measures add up to 360 degrees.

• Their measures add up to 90 degrees.

Tags

CCSS.7.G.B.5

What is the definition of perpendicular lines?

• Two lines that intersect at a 45-degree angle.

• Two lines that intersect at a right angle (90 degrees).

• Two lines that never intersect.

• Two lines that intersect at a 180-degree angle.

Tags

CCSS.HSG.CO.A.1

What are the properties of vertical angles?

• Vertical angles are equal & congruent.

• Vertical angles are parallel.

• Vertical angles are congressional.

• Vertical angles are supplementary.

Tags

CCSS.7.G.B.5

State the definition of supplementary angles.

• Two angles that add up to 90 degrees.

• Two angles that add up to 45 degrees.

• Two angles that add up to 270 degrees.

• Two angles that add up to 180 degrees.

Tags

CCSS.7.G.B.5

Given: ∠1 and ∠2 are supplementary. What can you conclude?

• Nothing

Tags

CCSS.7.G.B.5

In the given proof, what are the reasons for step 1 and 2?

• Angles that form a linear pair are supplementary.

• Substitution

• Reflexive Property of Congruence

• Angles of equal measure are congruent.

Tags

CCSS.7.G.B.5