Equilateral 5140

I have a circle with a diameter of 6.4 cm. I need to find out the length of the side of an equilateral triangle inscribed in a circle.

Correct answer:

a =  5.5426 cm

Step-by-step explanation:

D=6.4 cm r=D/2=6.4/2=516=3.2 cm A=(360/3)/2=60 a=2 r sin(A° rad)=2 r sin(A° 180π )=2 3.2 sin(60° 1803.1415926 )=5.543=5.5426 cm

Try calculation via our triangle calculator.




Did you find an error or inaccuracy? Feel free to write us. Thank you!










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

You need to know the following knowledge to solve this word math problem:


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

Related math problems and questions: