Added circle perimeter

Author: Japoncio3k

Geometry/CirclePerimeter.js

@@ -0,0 +1,7 @@
+//  https://en.wikipedia.org/wiki/Circle rounds to 2 decimal places
+const circlePerimeter = (radius) => {
+  const perimeter = radius * 2 * Math.PI
+  return parseFloat(perimeter.toFixed(2))
+}
+
+export { circlePerimeter }

Geometry/Test/CirclePerimeter.test.js

@@ -0,0 +1,8 @@
+import { circlePerimeter } from '../CirclePerimeter'
+
+describe('CirclePerimeter', () => {
+  it('should return circle perimeter given the radius', () => {
+    const res = circlePerimeter(3)
+    expect(res).toEqual(18.85)
+  })
+})