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Find the unit measure of ADI need help with this

Find the unit measure of ADI need help with this-example-1
User Anusha
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From properties of lines inscribed in circles we will have that:


\begin{gathered} AD+DB=AB:AD=DB \\ \\ \Rightarrow2AD=AB\Rightarrow AD=(AB)/(2) \\ \\ \Rightarrow AD=(60)/(2)\Rightarrow AD=30 \end{gathered}

So, the measure of AD is 30 units.

User PostureOfLearning
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