Equilateral triangle v2

An equilateral triangle has a perimeter 36 dm. What is its area?

Correct answer:

S =  62.3538 dm2

Step-by-step explanation:

o=36 dm a=o/3=36/3=12 dm  S=43 a2=43 122=36 3=62.3538 dm2

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Tips for related online calculators
See also our trigonometric triangle calculator.
The Pythagorean theorem is the base for the right triangle calculator.

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We encourage you to watch this tutorial video on this math problem: video1   video2

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