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tekilochka [14]
3 years ago
5

7. Given: AB CD, BD =DE

Mathematics
1 answer:
MAVERICK [17]3 years ago
5 0

Answer:

Step-by-step explanation:

Given that Given: AB = CD, BD =DE

The following addition postulates are true;

AB+BD = AD......  1

CD+DE = CE...... 2

Substituting AB = CD, BD =DEinto equation 1, the equations will become;

CD+DE = AD......  3

Subtract equation 2 from 3;

CD -CD+DE-DE = CE - AD

0+0 = CE-AD

0 = CE-AD

CE-AD = 0

Add AD to both sides

CE-AD+AD = 0+AD

CE = AD

AD = CE (Proved)

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