Answer:
x = 6
Step-by-step explanation:
Similar triangles mean that it is the same shape (with same angles) but different side lengths. To find out "x", the scale factor is needed first. The scale factor is the amount that one side length is scaled (or multiplied) to equal the corresponding side length on the other similar shape.
To find the scale factor, pick a corresponding side that both triangles have a value, such as the hypotenuse, 15 and 9.
15 / 9 = 5/3 (scale factor)
The corresponding side for x is 10.
With the scale factor, divide 10 by it and x equals 6.
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