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Question
use similar triangles to solve. a person who is 5 feet tall is standing 169 feet from the base of a tree, and the tree casts a 182 foot shadow. the persons shadow is 13 feet in length. what is the height of the tree? the height is
Step1: Establecer la proporción
Dado que los triángulos son similares, la proporción es $\frac{\text{altura de la persona}}{\text{sombra de la persona}}=\frac{\text{altura del árbol}}{\text{sombra del árbol}}$. Sea $h$ la altura del árbol. Entonces $\frac{5}{13}=\frac{h}{182}$.
Step2: Resolver para $h$
Multiplicar ambos lados por $182$: $h = \frac{5\times182}{13}$.
Calcular $5\times182 = 910$, luego $\frac{910}{13}=70$.
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$70$