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Nautilus · Answer 1 · 2018-09-13T19:26:47+0000

When two secant lines intersect each other outside a circle, the products of their segments are equal.

14(с + 14) = 10(10 + 20)
14с + 196 = 10 * 30
14с +196 = 300
14с = 300 - 196
14с = 104
с = 104/14
с ≈ 7.4

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