EQL triangle

Calculate the inradius and circumradius of an equilateral triangle with side a=77 cm.

Correct answer:

r1 =  22.2 cm
r2 =  44.5 cm

Step-by-step explanation:

 tan30=277r1 r1=277tan30=22.2 cm
 cos30=r2277 r2=277/cos30=44.5 cm

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

 
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