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NeTakaya
3 years ago
12

An equilateral triangle has an apothem measuring 2.16 cm

Mathematics
2 answers:
Tju [1.3M]3 years ago
7 0

Answer:

The answer is 24.2

Step-by-step explanation:

on edg. 2020

Llana [10]3 years ago
6 0

Answer:

d)   24.2 cm²

<em>Area of equilateral triangle  A = 24.22 cm²</em>

Step-by-step explanation:

<u><em>Step(i)</em></u>:-

<em> Perimeter of equilateral triangle  = 3 a</em>

Given  Perimeter of equilateral triangle  = 22.45 cm

   now   3 a = 22.45

  Dividing '3' on both sides,we get

             a = 7.48 cm

<u><em>Step(ii):</em></u>-

<em>Area of equilateral triangle</em>

<em>                                   </em>A = \frac{\sqrt{3} a^{2} }{4}<em></em>

<em>                                    </em>A = \frac{\sqrt{3} (7.48)^{2} }{4}<em></em>

<em>                                   A = 24.22 cm²</em>

<u><em>Conclusion</em></u><em>:-</em>

<em>Area of equilateral triangle  A = 24.22 cm²</em>

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