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A circle is centered on point B. Points A,C and D lie on its circumfrence.

A circle is centered on point B. Points A,C and D lie on its circumfrence.-example-1
User Rizwan Sharif
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1 Answer

20 votes
20 votes

To solve this problem, we have to use this theorem


m\angle ADC=(1)/(2)m\angle\text{ABC}

Replacing the given angle, we have


\begin{gathered} 23=(1)/(2)m\angle ABC \\ m\angle ABC=46 \end{gathered}

Hence, the angle ABC is equal to 46°.

User ProtoEvangelion
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