jetblackcap jetblackcap

22-01-2018
Mathematics

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If angle adc=134 and adb=5x+4 and bdc=7x-2 what does angle bdc measure

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11-02-2018

As I've shown on picture that I attached:
∠ADC=∠ADB+∠BDC⇒134=5x+4+7x-2
12x+2=134
12x=132⇒x=132/12
x=11
Angle BDC measure 7x-2=7*11-2⇒∠BDC=75.

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