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Vedmedyk [2.9K]
3 years ago
5

Please help with geometry homework ! Mark brainliest

Mathematics
1 answer:
Mashcka [7]3 years ago
6 0

Theorem: If two chords intersect within a circle, then the product of the lengths of the segments (parts) of one chord is equal to the product of the lengths of the segments of the other chord.

In your case this theorem sounds as

AM\cdot MB=CM\cdot MD.

If AM=7, MB=6, CM=8, then

7\cdot 6=8\cdot MD,\\ \\MD=\dfrac{7\cdot 6}{8}=\dfrac{21}{4}=5.25.

Note that CD=CM+MD=8+5.25=13.25.

Answer: correct choice is C

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