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What is the value of xin the figure below?АхB5Dс9O A. V126B. 45O C. 70D. 14O E.914O F. 145No

What is the value of xin the figure below?АхB5Dс9O A. V126B. 45O C. 70D. 14O E.914O-example-1

1 Answer

2 votes

Answer

F.


x=√(45)

Explanation

Triangles ABD and ACD are similar, then their corresponding sides are proportional, that is,


\frac{longest\text{ leg in ABD}}{longest\text{ leg in ABC}}=\frac{shortest\text{ leg in ABD}}{shortest\text{ leg in ABC}}

From the diagram:


(x)/(9)=(5)/(x)

Solving for x:


\begin{gathered} x\cdot x=5\operatorname{\cdot}9 \\ x^2=45 \\ √(x^2)=√(45) \\ x=√(45) \end{gathered}

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