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=r1772 r1=772tan30=22.2 cm
 cos30=772r2 r2=772/cos30=44.5 cm

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

 
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