More special, you’re going to explore how to apply scale factors to calculation enlargements and reductions.

You are watching: Dilation with a scale factor of 3

Finally, you’re going come use techniques to find missing variables within the provided problems.

So let’s obtain started!

Did you understand that dilations space all approximately us?

Whenever we desire to zoom and also enlarge a picture so you can see details, we space using a dilation transformation.

At eye exams, the pupil dilates (widens), enabling in much more light and giving your physician a much better view of the back of your eye.

When you build model airplanes, cars, or buildings that room true in scale and also measurement, you are performing a dilation.

And also your zero is a dilation together well.

What Is A Dilation

A dilation is a transformation that enlarges or reduces a number in size. This way that the preimage and image are comparable and space either lessened or enlarged utilizing a scale factor.

As viewed in the graphic below. A reduction (think shrinking) is a dilation that creates a smaller sized image, and also an enlargement (think stretch) is a dilation the creates a bigger image.


If the scale factor is in between 0 and also 1 the image is a reduction.
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Dilation Reduction


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Dilation – Enlargement


How To find The Scale factor Of A Dilation

To uncover the scale variable for a dilation, we find the center point that dilation and measure the distance from this center suggest to a allude on the preimage and likewise the street from the center point to a point on the image. The proportion of these ranges gives us the scale factor, as Math Bits Notebook accurately states.

Using dilation range factors, we have the right to shrink or broaden a figure to the size we desire, knowing that every angle is congruent, every segment is proportional, the slope of every segment is maintained, and the perimeter the the preimage and image have actually the very same scale factor.

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How to discover the range Factor


Next, you’ll learn exactly how to carry out the complying with operations:

Determine the scale element for the transformation.Identify the form of dilation.Draw a dilation using a range factor.Find the ratio of perimeters for two dilated figures.

Video – great & Examples

44 min

Introduction come Dilations00:00:20 – What room Dilations? just how to discover the range Factor?00:07:40 – offered the scale factor, recognize if the dilation is a palliation or enlargement (Examples #1-4)00:09:48 – determine the dilation and determine its scale factor (Examples #5-7)00:13:53 – Graph the dilation with the beginning as the center allude (Examples #8-9)00:20:02 – uncover the scale element given choose vertices indigenous the preimage and also image (Examples #10-11)00:28:27 – given a dilation solve for the indicated variables and also find the proportion of perimeters (Examples #12-13)Practice Problems with Step-by-Step options Chapter Tests with video clip Solutions