# What is the definition of a scale factor in math Identifying scale factors

Scale Factor Definition. A scale factor in math is the ratio between corresponding measurements of an object and a representation of that object. If the scale factor is a whole number, the copy will be larger. If the scale factor is a fraction, the copy will be smaller. When a scale factor is a fraction the shape decreases in size, but we still call this an enlargement. So a scale factor of ? means that the new shape is 4 times smaller than the original.

A scale factor is a number which scales, or multiplies, some quantity. C is also the coefficient of x, and may be called the constant of proportionality of y to x. The basic equation for it is image over preimage. In the field of measurements, the scale factor of an instrument is sometimes referred to as sensitivity.

The ratio of any two corresponding lengths in two similar geometric figures is called as Scale Factor. The numerical value of Scale Factor in Pythagorean Numerology is: 4. We're doing our best to make sure our content is useful, accurate and safe. If by any chance you spot an inappropriate comment while navigating through our website please use this form to let us know, and we'll take care of it shortly.

Forgot your password? Retrieve it. If by any chance you spot an inappropriate image within your search results please use this form to let us know, and we'll take care of it shortly. Term � Definition. Word in Definition. Princeton's WordNet 3. Freebase 3. How to pronounce Scale Factor?

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Definition Of Scale Factor

Scale Factor is used to scale shapes in different ctcwd.com geometry, we learn about different geometrical shapes which both in two-dimension and three-dimension. The scale factor is a measure for similar figures, who look the same but have different scales or ctcwd.come, two circle looks similar but they could have varying radii. A scale factor is a number by which a quantity is multiplied, changing the magnitude of the quantity. Scale factors are often used in geometric contexts, as part of figure models, and more. The larger penguin model above is 3 times larger than the smaller penguin; To change the larger penguin into the smaller one, we would use a scale factor of. The ratio of the length of the scale drawing to the corresponding length of the actual object is called as Scale Factor. More About Scale Factor. A scale factor is a number used as a multiplier in scaling. A scale factor is used to scale shapes in 1, 2, or 3 dimensions. Scale factor can .

A scale factor in math is the ratio between corresponding measurements of an object and a representation of that object. If the scale factor is a whole number, the copy will be larger. If the scale factor is a fraction, the copy will be smaller. A scale factor ratio can be expressed as a fraction, 1 2 , or a colon, 1 : 2. The scale factor for scaling up is a ratio greater than 1. The scale factor for scaling down is a ratio of less than 1. Once you know which way you are scaling, you compare corresponding sides using the correct basic equation.

Compare the side length of the real object to the length of the corresponding side in the representation. Here are two similar triangles. What is the scale factor used to create the second, larger figure?

The scale factor is 3. To go from legs of 12 c m to legs of 36 c m , we needed to multiply 12 c m times 3. Now, let's try to scale down. Here are two similar pentagons. What is the scale factor used to create the second, smaller figure?

Because we are scaling down, we divide corresponding side lengths smaller number by larger number :. The scale factor is 1 7.

Let's look at one more example and scale both up and down. Consider these two similar right triangles with labeled sides. If we have the little right triangle above and want to scale it up to the larger triangle, we write this:. So every other linear measure is multiplied times 5. If we have the big right triangle and want to scale it down to make the smaller one, we write this:. So every other linear measure is multiplied times 1 5 ; or divided by 5.

Scale is used in geometry to make accurate reproductions of figures; they are different sizes but not proportion. Figures are similar but to scale. Scale factor is used on similar geometric figures. You can find the scale factor of corresponding angles, sides, and even diagonals. Think in steps:. Suppose we have a rectangle that is 16 i n. We will use or 3 : 4 as our scale factor. The width of our smaller new shape must be 12 i n. We repeat these steps with the other dimension, 6 i n.

The height of our smaller rectangle must be 4. A scale model is a model accurate to a scale factor. If the copy of the actual object is not made to scale, it will look unrealistic, like a little child's toy.

One object can have different scales too. The greater the difference between the two numbers of the ratio, the smaller the model will be. A model that is 1 : 87 is generally going to be a lot smaller than a model with a ratio of 1 : To make scale models, you need accurate plans of the original item, like a scale drawing.

A scale drawing is an accurate plan of the real object, drawn using a scale factor to make the drawing small enough to handle. You multiply every printed dimension on the scale drawing by your scale factor to get the right sizes for model parts. If, for instance, you wanted to build a simple shed for your model railroad scene, you would use the ratio 1 87 , so a 32 - f o o t long shed would come out 4. Try your hand at these questions to see if you understand the concept of scale factor in mathematics.

Make an outsized effort! Scaling an object helps you visualize large real-world objects in small spaces or enlarge a small object for better viewing. Scale factor is how we ensure the representation of the object differs only in size from the original object. A common real-world use of scale factor is to bring vast areas of land down to small pieces of paper, like on a map.

Scale is used to allow designers, architects, and machinists to handle models of objects that would be too big to keep on a if they were actual size.

Get better grades with tutoring from top-rated professional tutors. Get help fast. Want to see the tutors near you? Math Tutors. Find a Tutor. Scale Factor Definition A scale factor in math is the ratio between corresponding measurements of an object and a representation of that object. A ratio measures the relationship between two things. You could create a ratio of left-handed students to all students, but that ratio is not a scale factor.

Table of Contents [hide] [show]. What you learned: After working your way through this lesson and video, you will learn: The definition of scale factor in math Scale factor formula for scaling up and down How to find scale factor of similar figures How to use scale factor to make a scale model. Instructor: Malcolm M.

Malcolm has a Master's Degree in education and holds four teaching certificates. He has been a public school teacher for 27 years, including 15 years as a mathematics teacher. Local and online. View Tutors. Tutors online. Ask a question Get Help.

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