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Mathematics 8 Online
OpenStudy (anonymous):

help please How do you determine the scale factor of a dilation?

OpenStudy (jordanloveangel):

1.Understand that a dilation takes a line not passing through the center to a parallel line. ... Draw an image of a dilation using the center and scale factor. ... Calculate the scale factor of a dilation. ... Draw an image of a dilation with a negative scale factor. ... Solve word problems by doing dilations.

undeadknight26 (undeadknight26):

^

OpenStudy (jordanloveangel):

@bangbang559 hope this helps

OpenStudy (anonymous):

@jordanloveangel how do you calculate the scale factor?

OpenStudy (jordanloveangel):

google it

OpenStudy (anonymous):

why cant you just tell me????

OpenStudy (jordanloveangel):

hold on ill send u the steps

OpenStudy (jordanloveangel):

1Divide the larger side length by the smaller length. Take a look at the two similar figures. There should be at least one corresponding pair of sides that both have marked measurements. Set the two sides up as a fraction, with the longer of the two serving as the numerator and the smaller serving as the denominator. You are essentially dividing the longer side by the smaller side. Example: There are two similar rectangles in a set. The first rectangle has a length of 4 centimeter (1.6 in) and a width of 2 centimeter (0.8 in). The second rectangle has a length of 16 centimeter (6.3 in) and a width of 8 centimeter (3.1 in). Find the linear scale factor between the two shapes. The length of the smaller rectangle corresponds to the length of the larger rectangle. The length of the smaller rectangle equals 4 centimeter (1.6 in). The length of the larger rectangle equals 16 centimeter (6.3 in). Scale factor = large length / small length = 16 / 4 2Simplify. Follow through by either dividing the numerator by the denominator, giving you a decimal answer, or by reducing fraction to its smallest, most simplified form. Example: The scale factor = 16 /4 To reduce this scale factor to a whole number or decimal, divide the numbers: 16 / 4 = 4 To keep the scale factor as a fraction, simplify it to its smallest form: 16 / 4 = 4 / 1 In ratio form, this would be written as: 4 : 1 3Check and write the answer. Check the answer by applying it to the other sides of the two shapes, if the other sides also have marked measurements. If the other pairs of corresponding sides reduce down to the same scaling factor, you have found the right value, and your answer is complete. Example: The width of the larger rectangle is 8 centimeter (3.1 in). The width of the smaller rectangle is 2 centimeter (0.8 in). To verify that the scale factor is 4:1, divide the larger width by the smaller width: 8 / 2 = 4 / 1 This could also be written as 4 : 1.

OpenStudy (jordanloveangel):

idk but hope this helps u :/

OpenStudy (bohotness):

P.P E.Ee.e

OpenStudy (bohotness):

You must divide the new enlargement by the old enlargement. So that means you do 9/3=3. So your scale factor is 3.

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