Equilateral triangle

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

Correct result:

S =  229.064 cm2

Solution:

a=23 cm h=a2−(a/2)2=232−(23/2)2≐19.9186 cm  S=a⋅ h2=23⋅ 19.91862=229.064 cm2

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Pythagorean theorem is the base for the right triangle calculator.
See also our trigonometric triangle calculator.

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