Hello, magentarita!

Find the perimeter of the equilateral triangle inscribed in a circle of radius 20 inchesCode:A * * * * /|\ * * / | \ * * / | \ * / 20| \ D * / | * * * / * \ * * / O \ * / \ B *- - - - - - - - -* C * * * * * * *

The triangle is

The circle has center and radius

Draw

Since is equilateral,

. . Then:

In right triangle inches

The side of the triangle is: . inches

Therefore, the perimeter is: . inches.