Do you know your proof stuff?

Use the given information to determine a valid statement.

• ∠ACD ≅ ∠BCD
• ∠ADC ≅ ∠BDC
• ∠ADC & ∠BDC are right angles.
• Segment AD ≅ Segment BD

What is a valid reason to justify the statement in the previous question.

• A segment bisector divides a segment into 2 ≅ segments.
• ⊥ lines form right angles.
• A segment bisector divides an ∠ into 2 ≅ ∠s.
• An ∠bisector divides an ∠ into 2 ≅ ∠s.

Use the given information to determine a valid statement.

• segment DE ≅ segment BE
• segment DE ≅ segment BE & segment CE ≅ segment AE
• segment CE ≅ segment AE
• ∠DEA ≅ ∠BEC

What is a valid reason to justify the statement in the previous question.

• A midpoint divides a segment into 2 ≅ segments.
• A segment bisector divides a segment into 2 ≅ segments.
• ⊥ lines form right angles.
• A midpoint divides an angle into 2 ≅ angles.

Use the given information to determine a valid statement.

• segment BA ≅ segment AC
• segment AC ≅ segment BC
• segment BA ≅ segment BC
• segment BA ≅ segment BC ≅ segment AC

What is a valid reason to justify the statement in the previous question.

• Sides opposite ≅ angles are ≅.
• Angles opposite ≅ sides are ≅.
• In a triangle, angles opposite ≅ sides are ≅.
• In a triangle, sides opposite ≅ angles are ≅.

Use the given information to determine a valid statement.

• ∠ADC and ∠BCD are right angles.
• ∠DAB and ∠CBA are right angles.
• ∠DAB ≅ ∠CBA
• ∠ADC ≅∠BCD

What is a valid reason to justify the statement in the previous question.

• ⊥ lines form right angles.
• All right angles are congruent.
• Right angles measure 90^o.
• Parallel lines form right angles.

Use the given information to determine a valid statement.

• ∠C ≅ ∠C
• segment EC ≅ segment CB
• segment AC ≅ segment CD
• ∠ECA ≅ ∠BCD

What is a valid reason to justify the statement in the previous question.

• An ∠ bisector divides an ∠ into 2 ≅ ∠s.
• All right angles are congruent.
• A segment bisector divides a segment into 2 ≅ segments.