Added FindTrianglePerimeter

Maths/FindTrianglePerimeter.js

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+/*
+* A polygon with three edges and three vertices is called a triangle. It is one of the fundamental geometric shapes.
+* The total length of a triangle's sides makes up the perimeter.
+* Algorithm to find the perimeter of a triangle
+*/
+function findTrianglePerimeter (x, y, z) {
+  return x + y + z
+}
+export { findTrianglePerimeter }

Maths/test/FindTrianglePerimeter.test.js

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+import { findTrianglePerimeter } from '../FindTrianglePerimeter'
+
+describe('findTrianglePerimeter', () => {
+  it('should return the perimeter of a triangle', () => {
+    expect(findTrianglePerimeter(5, 6, 4)).toBe(15)
+  })
+
+  it('should return the perimeter of a triangle', () => {
+    expect(findTrianglePerimeter(2, 6, 5)).toBe(13)
+  })
+
+  it('should return the perimeter of a triangle', () => {
+    expect(findTrianglePerimeter(7, 2, 6)).toBe(15)
+  })
+
+  it('should return the perimeter of a triangle', () => {
+    expect(findTrianglePerimeter(6, 3, 8)).toBe(17)
+  })
+})