Given: AB intersects DĖ at point C. What is the missing reason in step 5?
Prove: ZDCB ZECA
O linear pair postulate
O given
D
O definition of complementary angles
O congruent complements theorem
С
B
Reasons
1
given
AN
Statements
1
AB intersects DE at point C
2 DCB and BCE are a linear pair
GDCB is supp 10 BCE
ZBCE and ECA are a linear pair
5 _BCE is supp to ZECA
6 DCB = LECA
2 def, of lin pr
3 linear pair post
4 def of lin pr
5 2
6 Supp. thm
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