# How to write a scale factor

The following properties are preserved between the pre-image and its image when dilating: My teacher doesn't now how to teach us scale factors and i have a problem to make it easier to understand. A map of Levi's property is being made with a scale of 2 cm: What is the scale factor? Dayne, Scale factors on maps are generally given linearly. That means the scale factor is the scale comparing distances, not areas.

So if 2 cm on the map represents 3 meters, you could write that as a fraction and convert it to a common unit of meters: That's the scale factor 1: Almost always, when we talk about scale factors we mean the linear scale.

So a toy car in my day they were all called "dinky cars" like a Hot Wheels or Matchbox car is considered 1: However, it is important to realize that this has big implications for the volume of the car.

The scale of the toy car's volume is actually 1: That's because volume equals distance times distance times distance. Similarly, if you measure Levi's property on the map and see that it measures cm2, how do we calculate his real property area?

So he has square meters. You see how I made the calculation work to cancel out the units I didn't want any centimeters and replace it with the proper real size units meters.

The important things is to know that when a scale factor is given, unless otherwise stated explicitly, it is a linear scale factor, so if you are dealing with volumes or areas, you need to square or cube the scale to solve the problem.

Aside from that, it is just a fraction.Below are two standard scale tables for Engineering and Architectural drawings. To obtain the scale factor of an Engineering drawing scale: Multiply the feet of the desired scale by You could use a scale factor to solve! In this tutorial, learn how to create a ratio of corresponding sides with known length and use the ratio to find the scale factor.

Then, write an equation using the scale factor to find your missing measurement! In the example, divide by 8 to calculate a scale factor of If you have a remainder, round the number to the nearest integer.

Write a "1:" in front of the scale factor to present it as a ratio. Writing Scales in a Music Theory Exam. Whatever the scale is, the first thing you need to do is put in your starting note (the tonic, or "keynote"). If you're writing an ascending scale, start low. For descending scales, start high. Make sure you leave enough room on the left for the key signature, if you need one. Scale the original border down by this amount and your scale is changed.

The Ratio and Decimal numbers can be helpful if you are working in paper space and need to know what the scale factors are for window resizing in order to create the proper scale. To perform dilations, a scale factor and a center of dilation are needed. If the scale factor is larger than 1, the image is larger than the original; if the scale factor is less than 1, .