Question

I need help with my hw solve the number for the one with a side 6.4

Answer 1

We have the next relation

$\frac{12}{15}=\frac{6.4}{x}$

then we need to clear x

$x=\frac{6.4\cdot15}{12}=8$

the scale factor to have the bigger triangle from the smaller triangle is

$\frac{5}{4}$

for example

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