miaiswierd miaiswierd
  • 15-05-2018
  • Mathematics
contestada

I need help on 29 plz

I need help on 29 plz class=

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Catya
Catya Catya
  • 30-08-2018

The wavy line ~ means the triangles are similar. You can use ratio to solve for the side. If you rotate ΔXYZ counter-clockwise you can see that side SR=20 is side YZ=8 on the smaller triangle. This means that the side we are solving for QR matches up with side XZ=10 on the smaller triangle.

ratio : (I'll just use an X to represent side QR)

8/20= 10/X

cross  multiply

8X = 200

X = 200/8

X = 25


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