3 years ago

What is a scale factor?

1 answer:

jeka943 years ago

6 0

In two similar geometric figures, the ratio of their corresponding sides is called the scale factor. To find the scale factor, locate two corresponding sides, one on each figure. Write the ratio of one length to the other to find the scale factor from one figure to the other. say a triangle had points of A(-1,0),B(0,1),and C(1,0) and the scale factor is two you basically double all the points so the A' is (-2,0), B' is (0,2), and C' is (2,0).

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Please help me with these problems; geometry is really getting on my nerves. T-T

ivolga24 [154]

For #19 part A :

By vertical angles and then same side interior angles 3x + 2x = 180
5x = 180
x = 36

For #19 part B:

You are correct with the 35, but you missed the fact that the 105 angle is supplementary with the unknown angle inside the triangle. So:

180 - 105 = 75

Then:

180 = 35 + 75 + x
180 = 110 + x
x = 70

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