📐 Geometry Calculation Utilities

This module provides a set of TypeScript utility functions to calculate the area and perimeter (or circumference) of basic geometric shapes such as circles, squares, and rectangles.

All calculations return values rounded to two decimal places where applicable.

📁 File Overview

This file exports reusable functions for:

Circle

Square

Rectangle

Each function is pure, typed, and easy to test.

✨ Features

Written in TypeScript

Uses arrow functions

Returns precise values (rounded to 2 decimals for circle calculations)

Easy to integrate into frontend or backend projects

Suitable for unit testing with Jest

📦 Exported Functions 🔵 Circle calculateCircleArea(radius: number): number Calculates the area of a circle using the formula: Area=π×r2 calculateCircleArea(5); // 78.54

calculateCirclePerimeter(radius: number): number Calculates the perimeter (circumference) of a circle using the formula: Perimeter=2×π×r calculateCirclePerimeter(5); // 31.42

🟦 Square calculateSquareArea(side: number): number Calculates the area of a square: Area=side*side calculateSquareArea(4); // 16

calculateSquarePerimeter(side: number): number Calculates the perimeter of a square: Perimeter=4×side calculateSquarePerimeter(4); // 16

🟩 Rectangle calculateRectangleArea(length: number, width: number): number Calculates the area of a rectangle: Area=length×width calculateRectangleArea(5, 3); // 15

calculateRectanglePerimeter(length: number, width: number): number Calculates the perimeter of a rectangle: Perimeter=2×(length+width) calculateRectanglePerimeter(5, 3); // 16

🛠 Usage Example import { calculateCircleArea, calculateSquarePerimeter, calculateRectangleArea } from './geometry';

const area = calculateCircleArea(7); const squarePerimeter = calculateSquarePerimeter(5); const rectangleArea = calculateRectangleArea(10, 4);

🧪 Testing

These functions are ideal for unit testing using Jest + TypeScript.

Example test case:

expect(calculateSquareArea(4)).toBe(16);

📌 Notes

All functions assume positive numeric inputs

No external dependencies are required

Suitable for educational projects, utilities, and demos