Equilateral triangle

The equilateral triangle has a 23 cm long side. Calculate its area.

Correct answer:

S =  229.0637 cm2

Step-by-step explanation:

a=23 cm h=a2(a/2)2=232(23/2)219.9186 cm  S=2a h=223 19.9186=229.0637 cm2

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Tips for related online calculators
See also our right triangle calculator.
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See also our trigonometric triangle calculator.

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

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