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I am Lyosha [343]
3 years ago
13

What is the value of x? A. 2 Units B. 3 Units C. 5 Units D. 8 Units

Mathematics
1 answer:
Fudgin [204]3 years ago
7 0

You need the formula for geometric mean for right triangles as it applies to the altitude. For us, that formula will be \frac{BD}{AD}=\frac{CD}{BD} where BD is your altitude. The formula then, filled in accordingly, would be \frac{10}{x}=\frac{4x}{10}. We cross multiply to get that 4x^2=100. Divide both sides by 4 to get x^2=25, so x = 5. Choice C is the one you want.

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