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I need help with these:

Suppose triangleABC ~ triangleJKL with BC = 28, JK = 12, and KL = 42. Find the perimeter of triangleABC if the perimeter of triangleJKL is 72.


Find the scale factor of triangleDEF to triangleXYZ if triangleDEF ~ triangleXYZ, DE=10, XZ=20, and XY=45.

If I can help on these two, I can do the rest of my worksheet. Step by step would help a lot!

BC is to KL as perimeterABC is to 72

solve for P.

De/XY= scale factor
10/45= scale factor

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