The perimeter of a quarter circle is 14.28 miles. what is the quarter circle's radius?

Circumference= 2πr

Circumference= perimeter  

14.28km= 2(3.14)r

14.28= 6.2831853072r

divide both sides by 6.2831853072

2.27= r

ANSWER: The radius is 2.27km

Hope this helps! :)

Step-by-step explanation:

For example, A square is a regular quadrilateral. All of its angles are equal (90°). All of its sides are of equal length. Opposite sides are parallel. The diagonals bisect each other at 90°. The diagonals are equal in length. It has 4 lines of symmetry. Order of rotational symmetry: 4.
hope this helps