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steposvetlana [31]
3 years ago
12

Hallar la corona circular si su radio mayor es 5 y el su radio menor es 2 ?

Spanish
1 answer:
KATRIN_1 [288]3 years ago
7 0

<span>el área de un circulo es </span>

<span>A=π*r² </span>

<span>si al radio grande lo llamamos R y al pequeño r tenemos que el área de la corono va a ser igual a el área del circulo grande, menos la del pequeño, tenemos que </span>

<span>Área corona=π*R²-π*r², sacando factor común π </span>

<span>=π(R²-r²), como ya sabemos algunos datos, los reemplazamos en la ecuación y despejamos R </span>

<span>27=π(R²-3²) </span>

<span>(27/π)+9=R² </span>
<span>17.59≈R² </span>
<span>4.19≈R </span>

<span>espero que te sirva</span>
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