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Start your free trial###### Daniel Springer

Courses Plus Student 5,090 Points# Completed Project: Please comment if you want to. Any suggestions / improvements are welcome!

# code

```
// 1. Attach this file geometry.js to the index.html file
// 2. Create a function that calculates the area of a rectangle.
// The function should accept the width and height as arguments
// and return the area of that rectangle.
// The area of a rectangle is the width * height
var message;
var totalArea;
var totalVolume;
var circleArea;
var sphereVolume;
function area(width, height){
while(isNaN(width)){
width = prompt("what is the width of the circle?")
width = parseFloat(width)
if(isNaN(width)){
alert("The width input is not a number, try again")
}
}
while(isNaN(height)){
height = prompt("what is the height of the circle?")
height = parseFloat(height)
if(isNaN(height)){
alert("The height input is not a number, try again")
}
}
return totalArea = width * height
}
alert("The area of the circle is " + area())
console.log(area)
// 3. Create a function that calculates the volume of a rectangular prism.
// The function should accept the width, height and length as arguments
// and return the volume of that rectangular prism.
// The volume of a rectangular prism is the width * height * length
function volume (width, height, lenght){
while(isNaN(width)){
width = prompt("what is the width of the rectangular prism?")
width = parseFloat(width)
if (isNaN(width)){
alert("The width input is not a number, try again")
}
}
while(isNaN(height)){
height = prompt("what is the height of the rectangular prism?")
height = parseFloat(height)
if (isNaN(height)){
alert("The height input is not a number, try again")
}
}
while(isNaN(lenght)){
lenght = prompt("what is the lenght of the rectangular prism?")
lenght = parseFloat(lenght)
if (isNaN(lenght)){
alert("The lenght input is not a number, try again")
}
}
return totalVolume = Math.round(width * height * lenght)
}
alert("The volume of the rectangular prism " + volume())
console.log(volume)
// 4. Create a function that calculates the area of a circle.
// The function should accept the radius of the circle as an argument
// and return the area of that circle.
// The area of a circle is the value of π * radius^2
function circleArea(radius){
while(isNaN(radius)){
radius = prompt("What is the radius of your circle?")
radius = parseFloat(radius)
if(isNaN(radius)){
alert("The height input is not a number, try again")
}
}
return circleArea = Math.round(Math.PI * (radius * radius))
}
alert("The area of the circle is " + circleArea())
console.log(circleArea)
// 5. Create a function that calculates the volume of a sphere.
// The function should accept the radius of the sphere as an argument
// and return the volume.
// The volume of a circle is: 4/3 * π * radius^3
function sphereVolume(radius){
while(isNaN(radius)){
radius = prompt("What is the radius of your sphere?")
radius = parseFloat(radius)
if(isNaN(radius)){
alert("The height input is not a number, try again")
}
}
return sphereVolume = Math.round( 4 / 3 * Math.PI * (radius * radius * radius))
}
alert("The area of the circle is " + sphereVolume())
console.log(sphereVolume)
// 6. Use console.log to test each function and output to the JavaScript console
// Here are the values to test and the expected results
// -- Area of rectangle that is 5 wide and 22 tall: 110
// -- Volume of a rectangular prism that is 4.5 x 12.5 x 17.4: 978.7499999999999
// -- Area of a circle that with a radius of 7.2: 162.8601631620949
// -- Volume of a spehere with a radius of 7.2: 1563.4575663561109
message = "<h1>Here are your results:</h1>"
message += "<br>"
message += "<h3>The area of the circle is " + totalArea + "</h3>";
message += "<h3>The volume of the rectangular prism is " + totalVolume + "</h3>";
message += "<h3>The area of the circle is " + circleArea + "</h3>";
message += "<h3>The area of the circle is " + sphereVolume + "</h3>";
document.write(message);
```

## justdave

31,518 Points## justdave

31,518 PointsI think you'll get more replies if you link to some working code!