Triangle eq

Calculate accurate to hundredths cm height of an equilateral triangle with a side length 12 cm. Calculate also its perimeter and content area.

Result

h =  10.39 cm
o =  36 cm
S =  62.35 cm2

Solution:

h=122−(12/2)2=10.39 cmh=\sqrt{ 12^{ 2 }-(12/2)^{ 2 } }=10.39 \ \text{cm}
o=3⋅ 12=36 cmo=3 \cdot \ 12=36 \ \text{cm}
S=12⋅ 122−(12/2)2/2=62.35 cm2S=12 \cdot \ \sqrt{ 12^{ 2 }-(12/2)^{ 2 } }/2=62.35 \ \text{cm}^2

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

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