1st Geometry Proving 1st Period

What is the first reason for the two-column proof? (marked with red question mark)

• Given

• Conclusion

• $\angle1\cong\angle7$

What is the second reason for the two-column proof? (marked with red question mark)

• Given

• Corresponding Angles Theorem

• $\angle1\cong\angle7$

What is the fourth statement for the two-column proof? (marked with red question mark)

• Given

• Corresponding Angles Theorem

• $\angle1\cong\angle7$

What is the first reason for the two-column proof? (marked with red question mark)

• Given

• Reflexive Property of Congruence

•  $\Delta CAD\cong\Delta ACB$  
  

What is the third reason for the two-column proof? (marked with red question mark)

• Given

• Reflexive Property of Congruence

•  $\Delta CAD\cong\Delta ACB$  
  

What is the fourth statement for the two-column proof? (marked with red question mark)

• Given

• Reflexive Property of Congruence

•  $\Delta CAD\cong\Delta ACB$  
  

What is the fifth reason for the two-column proof? (marked with red question mark)

• Given

• Reflexive Property of Congruence

• Definition of Congruent Triangles

What is the sixth statement for the two-column proof? (marked with red question mark)

•  $\Delta CAD\cong\Delta ACB$  
  

•  $\angle DAC\cong\angle BCA$  
  

•  $AD\parallel BC$  

What is the answer for the space with red question mark? 

•  $\angle1\ and\ \angle2$  
  

• Definition of Complementary Angles

•  $m\angle2=m\angle3$  
  

What is the answer for the space with red question mark?

• $\angle1\ and\ \angle2$
  

• Definition of Complementary Angles

• $m\angle2=m\angle3$