Proofs

[vivid cipher]

1. Wait patiently for a helper to come along.
2. Once someone helps you, say thank you and close the thread with:

+close

3. Feel free to nominate the person for helper of the week in #helper-nominations
4. Do not ping the mods, unless someone is breaking the rules.
5. If you're happy with the help you got here, and the server overall, you can contribute financially as well:

[twin wing]

$BE||AC= $EBA+A=$180

[tulip raptor]

Currently Busted
Compile Error! Click the reaction for more information.
(You may edit your message to recompile.)

[twin wing]

$A=$x,
Then from question, $A=$EBC=$x

[tulip raptor]

Currently Busted
Compile Error! Click the reaction for more information.
(You may edit your message to recompile.)

[twin wing]

$EBC+A+ABC=$180

[tulip raptor]

Currently Busted

[twin wing]

$ABC=$180-2x,
Use linear pair property to get DBE

[tulip raptor]

Currently Busted

[twin wing]

u will find $DBE=$A