Geometry Proofs

What is the "statement" for step 3 of the proof? 

• ∡EDA≅∡DCB

• ∡AED≅∡BEC

• DE=CE

• ∡AED≅∡CED

What is the "statement" for step 2 of the proof?

• ∆BAC≅∆DAC

• BC=DC

• ∡B≅∡D

• ∡BAC≅∡DAC

Q1. What is the angle of a right triangle?

• A) 100°

• B) 80°

• C) 90°

• D) 180°

Q1. What is the angle of a right triangle?

• A) 100°

• B) 80°

• C) 90°

• D) 180°

• 2x-6=7x+4
• 2x-6+7x+4=90
• 2x-6+7x+4=180
• 2x-6+7x+4=360

Lines l and m are parallel and the measure of angle 1 is 52 degrees, find the measure of angle 7.

• 52 degrees

• 180 degrees

• 128 degrees

• 90 degrees

Lines l and m are parallel and the measure of angle 1 is 52 degrees, find the measure of angle 3.

• 52 degrees

• 180 degrees

• 128 degrees

• 90 degrees

Fill in the missing proofs.

• Transitive Property, SAS(Side-Angle-Side)

• Reflexive Property, SAS(Side-Angle-Side)

• Reflexive Property, Vertical Angles Thm.

• Transitive Property, SSS(Side-Side-Side)

What is the "reason" for step 4 of the proof?

• proof

• AAS
  ≅ Thrm

• ASA
  ≅ Thrm

• SAS
  ≅ Thrm

What is the "reason" for step 5 of the proof?

• Vertical Angle Theorem

• proof

• def. of angle bisector

• CPCTC