B. complete this proof.

given: c is the midpoint of bd and ae.

prove: ab de

statement

1. c is the midpoint of 1. given

bd and ae

2. bc - cd and

reason

3. ac ab + bc,

ce - cd + de

4. ab - ac - bc

5. substitution

property

6. de = ce - cd

6.

glencoe geometry

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