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boyakko [2]
3 years ago
14

HELP ME PLS THANK YOU<<<3333

Mathematics
1 answer:
Vlad [161]3 years ago
4 0
  • Answer:

<em>≈ 63.30 ft²</em>

  • Step-by-step explanation:

<em>Heron formula</em>

<em>A = √p(p - a)(p - b)(p - c)</em>

<em>a = 9 ; b = 15 ; c = 20</em>

<em>p = (a + b + c)/2 = (9 + 15 + 20)/2 = 44/2 = 22</em>

<em>A = √22(22-9)(22-15)(22-20)</em>

<em>= √22×13×7×2</em>

<em>= √4004</em>

<em>≈ 63,27</em>

<em>≈ 63.30 ft²</em>

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