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Kryger [21]
3 years ago
14

If a circle has an area of 84π units then what is the measure of its

Mathematics
1 answer:
Tatiana [17]3 years ago
6 0
  • <em>Answer:</em>

<em>a. 2√21 units</em>

  • <em>Step-by-step explanation:</em>

<em>Hi there ! </em>

<u><em>Area formula</em></u>

<em>A = π·r²</em>

  • <em>replace A</em>

<em>84π = πr²</em>

<em>r² = 84π/π</em>

<em>r² = 84</em>

<em>r² = 2²×3×7</em>

<em>r = √2²×3×7</em>

<em>r = 2√3×7</em>

<em>r = 2√21</em>

<em>Good luck !</em>

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