Math Tutor help for the length of AD points in a circle

label Mathematics
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schedule 1 Day
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Nov 1st, 2015

Thank you for the opportunity to help you with your question!

When two secant lines AB and CD intersect outside the circle at a point P, then

PA.PB = PC.PD

In this case, the we will have AB.AC=AD.AE

3.5 * 28 = AD * 14

AD=(3.5 * 28) / 14

=7cm

The answer is C.

Please let me know if you need any clarification. I'm always happy to answer your questions.
Nov 1st, 2015

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