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sweet [91]
3 years ago
13

Ivan found the change in a scale factor. His work is shown below. What error did Ivan make?

Mathematics
2 answers:
AlladinOne [14]3 years ago
9 0
Ivan wrote the ratio incorrectly. The ratio should be written as the old length to the new length, so it should be <span>35/10</span><span>, which reduces to </span><span>7/2</span><span>. When going from larger to smaller dimensions, the change in the scale factor is a ratio that looks like an improper fraction, with a larger number in the numerator and a smaller number in the denominator.</span>
Tresset [83]3 years ago
5 0
Scale factor is:
factor = (new length) / (old length)
Ivan correctly inserted numbers and correctly divided these two numbers by 5.

There is no error in the shown picture.
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See explanation

Step-by-step explanation:

Given \triangle ABC\cong \triangle ADC

According to the order of the vertices,

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