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Master Scale Diagrams: Learn How to Create & Interpret

11WE.A1.1

Simple interest

Simple Interest — Word Problem

Basic Concepts of Simple Interest – Word Problem

Borrowing Money for More Than One Year  – Word Problem

Investigate the Advantages of Borrowing Money  – Word Problem

11WE.A1.2

Taxes, discounts, tips and more

Discounts — Word Problem

Taxes — Word Problem

Percentage - Applying a Discount Price– Word Problem

Percentage - Applying a Discount Percent – Word Problem

Percentage - Applying a Tax Total – Word Problem

Percentage - Applying a tax Percent – Word Problem

11WE.A1.4

auto-gen

Arithmetic sequences

Arithmetic series

Arithmetic series formula

11WE.A2.2

Rectangular shape related questions in linear equations

Percent of a number

Percent of a Number

percent of a number – Word Problem

Percent of a Number  Fraction Percent

Percent of a Number Integer Percent 

Percent of a number number With Decimal Percent 

Percent of a Number  Three Digits Number Percent

11WE.A3.4

Adding and multiplying percents

Add and Multiply Percents — Word Problem

Add and Multiply Percents – Word Problem

11WE.A3.6

Money related questions in linear equations

11WE.A3.8

Rates

Find the Biggest Rate 

Find the Unit Price 

Unit Rate Fill in Box

Find the Quickest Rate 

Unit Rate

11WE.B2.1

Geometric sequences

Geometric series

Geometric Series

11WE.B2.2

Finance: Compound interest

Finance: Compound Interest

11WE.C1.7

Applications of quadratic functions

11WE.C2.1

Scale diagrams

11WE.C2.4

Distance and time related questions in linear equations

Grade 11 Mathematics for Work and Everyday Life, Workplace Preparation (MEL3E)

A. Earning and Purchasing

B. Saving, Investing, and Borrowing

C. Transportation and Travel

math

Intro

- Hi and welcome to this question right here. We're trying to figure out the actual length of the objects now, okay? 
And there's a scale of the image of the leaf is 1.02 and here is the length of the image at 50 centimeters. Now there is something that we have to know, okay? The equation says the ratio is based on the image divided by actual part of the object. What happened is the image on top the actual object on bottom. Let's continue on with our work right here. We know the ratio is 1 and .2. The 1 is the image and the 
.2 is the actual. I'm going to continue my work right here. This is my 1. This is my 0.2 And I'm going to make it equal to another fraction here because I do know the length of my image. It's 50 centimeters. So again, the image goes on the top. Here's my 50 centimeter and the missing number is this part right here which is the actual, the length of the object, okay? It looks like you do know everything except this part right here. So the math here is quite simple. But think about this way. They're equal to each other. How do I go from 1 to 50? I multiply by 50, didn't I? You have to do the same to the bottom. You also have to times by 50 to the bottom part. So 50 times .2, if you use the calculator, you're going to get an answer of, just going to be, a ten for the final answer. The actual length of this leaf here is just going to be 10 centimeters, okay? 
Thanks for watching.

What is the actual length of a street on the map? All we need is a ruler and the map's scale factor! By using the scale factors, we can easily find the actual size of an object. See how to do that in this lesson.

Understanding scale drawings with examples

Ratios

Enlargements and reductions with scale factors