Equilateral triangle

How long should the minimum radius of the circular plate be cut into an equilateral triangle with side 21 cm from it?

Correct answer:

r =  12.12 cm

Step-by-step explanation:

a=21 cm sin60° = r  a/2 r=sin60°a/2=sinπ/3=12.12=12.12 cm



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







Tips for related online calculators
Calculation of an equilateral triangle.
See also our right triangle calculator.
See also our trigonometric triangle calculator.
Try conversion angle units angle degrees, minutes, seconds, radians, grads.

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   video2

Related math problems and questions: