Write a scale factor

The scale factor is 1: Set up ratios of the corresponding sides of the triangles. The corresponding sides of the triangles, however, are in the same length ratio, also called the scale factor.

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Please help improve this article by adding citations to reliable sources. This confirms that the scale factor of the smaller triangle to the bigger triangle is 2.

What Is Scale Factor?

So what is scale factor? I want all students to work the problems out on their worksheet as well as place their answer on the white boards for a quick check for understanding by me.

It also includes the case in which one or more scale factors are equal to zero projectionand the case of one or more negative scale factors a directional scaling by -1 is equivalent to a reflection. When the scale factor is a positive number smaller than 1, scaling is sometimes also called contraction.

It occurs, for example, when a faraway billboard is viewed from an oblique angleor when the shadow of a flat object falls on a surface that is not parallel to it. Sciencing Video Vault Multiply the other sides in the larger triangle by the the ratio calculated in Step 2.

To get this lesson started, I like to pose the following problem: For the practice portion of the lesson, I am going to give the kids a worksheet as well as the whiteboards. In the example, if you divided 40 by 20 you would get a scale factor of 2.

What does it tell you? The result of uniform scaling is similar in the geometric sense to the original.

Dilations in Math

Attention to detail in terms of setting up the unit rate is also very important, as putting the wrong number in the numerator could spell disaster! This lesson brings in mathematical practice 2 and 4 - as students are applying what they know to real world scenarios - and they are taking a value given as a scale or scale factor and using it to solve problems.


Scaling is a linear transformationand a special case of homothetic transformation. Divide one of the sides in the bigger triangle by its corresponding side in the smaller triangle to determine the scale factor for the smaller triangle to the bigger triangle.

Look for and express regularity in repeated reasoning. Launch 10 minutes Opener: In the example, when you multiply 5 by 2 and 10 by 2, you get 10 and 20, respectively. This article needs additional citations for verification. I also think it is important that they have examples in their hands.

While I like to use whiteboards and table challenges on a regular basis Additionally, students get an opportunity to work out problems involving scale factor. How to Find the Scale Factor of a Triangle By Jordan Whitehouse; Updated April 24, Similar triangles are objects that have the same shape and angle size, but their side lengths are different.

Divide both numbers in one of the ratios by their highest common factor. This will give you the scale factor of the bigger triangle to the smaller triangle. The reason for the worksheet is that I want students to have a reference to go back to when they start to study for a test - what kinds of problems did we go over in class?

Unsourced material may be challenged and removed. Uniform scaling happens, for example, when enlarging or reducing a photographor when creating a scale model of a building, car, airplane, etc.

More general is scaling with a separate scale factor for each axis direction. When the scale factor is larger than 1, uniform or non-uniform scaling is sometimes also called dilation or enlargement.A scale factor represents the ratio of two corresponding lengths in similar geometric shapes.

Two shapes must be similar for the scale factor between the two of them to be a relevant ratio. To compute the scale factor, one should divide the length of one shape's side by the corresponding length of.

Using Scale in Drawings SCALE FACTOR Figures that are congruent have exactly the same size and shape. They have a ratio to each other. IF Different ways to write the scales A scale is simply a ratio, and therefore can be. We provide FREE Solved Math problems with step-by-step solutions on Elementary, Middle, High School math content.

How to Find the Scale Factor of a Triangle

We also offer cost-effective math programs which include Math Lesson Plans aligned to state-national standards and Homework Help. Scale factor - how is it different than the scale of a map?

Students will jot the learning target down in their agendas (our version of a student planner, there is a place to write the learning target for every day).

Activating Prior Knowledge: and they are taking a value given as a scale or scale factor and using it to solve problems.

The scale factor, sometimes called the scalar factor, measures how much larger or smaller the image is. Below is a picture of each type of dilation (one that gets larger and one that gest smaller) Below is a picture of each type of dilation (one that gets larger and one that gest smaller).

Mar 02,  · Here is the exact question: Determine whether the polygons are similar. If so, write a similarity statement and give the scale factor in same order as the similarity statement.

Scale Factor

If not, explain. Triangle #1: 6, 10, 15 Triangle #2: 12, 20, 30 I am NOT looking for just the answer. I need someone to explain HOW to solve this and HOW to find the Status: Resolved.

Write a scale factor
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