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28-07-2020
Mathematics

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What is the length of JM in the given figure?

What is the length of JM in the given figure class=

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tramserran tramserran

28-07-2020

Answer: B. 30

Step-by-step explanation:

When given a secant and a tangent, the formula is:

exterior of secant × secant = tangent²

KM × JK = LK²

10 × (JM + 10) = 20²

10JM + 100 = 400

10JM = 300

JM = 30

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