M1 Proofs: Pre-proofs

Which property justifies the next step?

• Definition of linear pair
• Definition of supplementary angles
• Congruent supplements thm
• Linear pair postulate

Tags

CCSS.7.G.B.5

Which are pairs of vertical angles?

• ∠COB & ∠COA
• ∠AOD & ∠AOC
• ∠COB & ∠AOD
• ∠BOD & ∠AOD

Tags

CCSS.7.G.B.5

Rigid Motions preserve ...

• size and shape
• size and location
• shape and location
• shape and direction

Tags

CCSS.HSG.CO.B.6

What is the justification (reason)?

• reflexive property
• definition of segment bisect
• definition of a midpoint
• substitution property

Tags

CCSS.HSG.CO.C.10

What is the name of the PURPLE line?

• AB
• BC
• BD
• AD

Tags

CCSS.4.G.A.1

What is the name of the RED angle?

• BAC
• BDA
• ABD
• DAC

Tags

CCSS.HSG.CO.C.10

"a segment from a vertex of a triangle to the opposite side, forming a 90 degree angle"

• altitude
• median
• bisector
• midsegment

"a polygon with congruent sides and congruent angles"

• equipolygon
• undistributed polygon
• regular polygon
• normal polygon

Tags

CCSS.2.G.A.1

Which of the following is the definition of a midpoint of a segment?

• Line or part of a line that divides a segment into 2 congruent segments.
• Point that divides a segment into 2 congruent segments.
• Line that is perpendicular to and divides the segment into 2 congruent segments.
• Segment that goes to the midpoint of the opposite segment and divides the segment into 2 congruent segments.

Tags

CCSS.HSG.CO.A.1

What does the word BISECT mean?

• To cut something into more than five pieces.
• It is a plane with two sets of wings.
• A shape that has three sides. 
• To cut something into two congruent pieces or in half.

Tags

CCSS.HSG.CO.A.1