emoreno0137
emoreno0137 emoreno0137
  • 10-11-2020
  • Mathematics
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help with this pleaseeee

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yanni731 yanni731
  • 10-11-2020
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
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