U
Proving the Parallelogram Side Theorem
Given: ABCD is a parallelogram.
Prove: ABCD and BC DA
Angles Segments Triang
Reasons
ASA
def. of parallelogram
def of alt interior angles
alternate interior angles theorem
Statements
1. ABCD is a parallelogram
2. draw AC
3. AB || CD
4. AC 2 AC
Reasons
1. given
2. unique line postulate
3. def. of parallelogram
4. reflexive property
Correct Assemble the next
statement
Intro
COD000000
10 of 16