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Help with this pleaseeee

Help with this pleaseeee-example-1
User Axkibe
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1 Answer

4 votes
The measure of angle ABC is equal to ABD + CBD. If you have the measure of ABC and CBD, then you can subtract CBD from ABC to get the measure of ABD. Proof below:
ABC = ABD + CBD
subtract CBD from both sides
ABC - CBD = ABD
User Xargs
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5.6k points