Geometric Proof Introduction

When giving reasons for angles to be congruent in a proof, which of the following may apply?

• Vertical angles congruent

• Alt. Interior angles are congruent

• Third angles theorem

• Corresponding Angles are Congruent

• None of these

If you already know in a proof or have given reasons for at least two pairs of angles to be congruent in each triangle, what is a reason you can always give to why the third angles in each triangle are congruent?

• Vertical angles theorem

• Third angles theorem

• Alt. Interior angle theorem

• Corresponding angle theorem

What divides an angle into two congruent angles?

• Angle Bisector

• Segment Bisector

• Midpoint

• Vertical Angles

When you know all the sides and angles of one triangle are congruent to all the sides and angles of another triangle... you can say they are congruent by which of the following....

• Def. of Midpoint

• Def. of Segment Bisector

• Def. of Congurent Triangles

• Def. of Angle Bisector

How do they mark a geometric diagram to show parallel lines?

• congruency or tic marks

• arcs or swish marks

• arrows

• right angle box

If M is the midpoint of AB, then AM = MB. Which of the following "reasons" fits for the statement?

• Addition POE

• Def. of Midpoint

• Reflexive POE

• Symmetric

Are the triangles congruent, if yes, why?

• SAS

• ASA

• AAS

• Not congruent

Are the triangles congruent, if yes, why?

• SAS

• ASA

• AAS

• Not Congruent

Are the triangles congruent, if yes, why?

• SSS

• SAS

• ASA

• Not Congruent

Are the triangles congruent, if yes, why?

• SSS

• SAS

• AAS

• Not Congruent