Example javascript library on shapes for Phone.com.

Featured shapes:

• circle
• right triangle
• equilateral triangle
• rectangle
• square
• parallelogram

For each shape:

• calculate the area
• calculate the perimeter
• proportionally resize the shape up or down, given a floating-point scale factor

Test in the browser: https://npm.runkit.com/phone-com-project

Add the npm package to your project with: npm install phone-com-project --save