Geometric Proofs

If <1 and <2 are complementary, then m<1 + m<2 = 90

• Addition POE
• Subtraction POE
• Def of right angle
• Def of Complementary Angles

Tags

CCSS.7.G.B.5

If X = Y, then X + 5 = Y + 5

• Addition POE
• Subtraction POE
• Reflexive POE
• Transitive POE

Tags

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.3

What is the justification?

• Symmetric Prop.
• Angle addition postulate
• Reflexive Prop
• Transitive Prop.

Tags

CCSS.8.G.A.2

AB = AB

• Reflexive POE
• Transitive POE
• Symmetric POE
• Distributive POE

Tags

CCSS.HSA.REI.A.1

Which is the correct reason for statement 2 in the proof?

• Given
• Transitive Property
• Definition of Congruent Angles
• Vertical Angles are congruent.

Tags

CCSS.7.G.B.5

What is the missing statement in the proof?

• 2m∠ABD=m∠ABD+m∠ABD
• m∠ABD=m∠DBC
• m∠ABC=m∠ABC
• m∠ABD+m∠ABD=m∠ABD+m∠DBC

Tags

CCSS.HSG.CO.C.9

What is the reason?

• Definition of congrucent
• Definition of midpoint
• Definition of segment
• Segment Addition 

Tags

CCSS.HSG.SRT.B.4

What is the reason?

• Transitive 
• Substitution
• Middle Man
• Replacing 

Tags

CCSS.HSA.REI.C.5

What is the reason?

• Definition of Complementary
• Definition of 180 
• Definition of supplementary
• Angle Addition

Tags

CCSS.7.G.B.5

What is the reason?

• Angle Addition 
• Segment Addition
• Definition of Congruence
• Definition of Between

Tags

CCSS.HSG.CO.A.1