khenry5710keeks khenry5710keeks

12-07-2016
Mathematics

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What is the measure of angles DAB and DCB?

What is the measure of angles DAB and DCB? class=

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dalendrk dalendrk

12-07-2016

\((10+5z)+(4z-10)=180\\10+5z+4z-10=180\\9z=180\ \ \ |divide\ both\ sides\ by\ 9\\z=20\\\\\angle DAB=4z-10\\|\angle DAB|=(4\cdot20-10)^o=(80-10)^o=70^o\\\\\angle DCB=10+5z\\|\angle DCB|=(10+5\cdot20)^o=(10+100)^o=110^o\)

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