Proof Practice

What is the justification?

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

Tags

CCSS.8.G.A.2

What is the justification that the measure of angle DAE plus the measure of angle EAF = 90 degrees?

• definition of supplementary angles
• definition of complementary angles
• Vertical Angles Theorem
• definition of bisect

Tags

CCSS.7.G.B.5

What is the justification?

• Transitive Property
• Substitution Property
• Reflexive Property
• Symmetric Property

Tags

CCSS.HSA.REI.A.1

What is the justification?

• Reflexive Prop.
• Symmetric Prop.
• Transitive Prop.
• Substitution

Tags

CCSS.HSG.SRT.B.5

What is the reason for the statement below?
Given: m∠1 = 63
m∠1 + m∠2 = 90
Prove: 63 + m∠2 = 90

• Reflexive Property of Equality
• Symmetric Property of Equality
• Transitive Property of Equality
• Substitution Property of Equality

Tags

CCSS.HSA.REI.A.1

CCSS.HSG.CO.C.9

Solve: 3x + 2 = 23 - 4x
Step 1: 7x + 2 = 23 
Step 2: 7x = 21
What is the justification for Step 2's statement?

• Addition property of equality
• Simplifying
• Subtraction property of equality
• Distributive property

Tags

CCSS.HSA.REI.A.1

What is the reason?

• Definition of complementary

• Definition of supplementary

Tags

CCSS.7.G.B.5

What is the reason?

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

Tags

CCSS.7.G.B.5

State the proof reason given:

angle 2 & angle 4 are supplementary

• Same side interior angle theorem

• Same side exterior angle theorem

• Definition of supplementary

• Linear Pair Postulate

Tags

CCSS.8.G.A.5

State the proof reason given:

angle 2 & angle 6 are congruent

• Same side interior angle theorem

• Corresponding angle theorem

• Definition of congruent angles

• Alternate interior angle theorem

Tags

CCSS.8.G.A.5