Triangle similarity what is the value of x?

To solve this you can make a proportion where the matching sides will correspond to each other. It should look something like this:

Now you must cross multiply

10*42 = 15*x

420= 15x

To isolate x divide 15 to both sides

420/15 = 15x/15

28 = x

Hope this helped!

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answer: both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.

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