If two triangles are similar, it means that the ratio of their corresponding sides is equal.
Assuming the triangle that is similar to triangle XYZ is triangle ABC
Thus,
XY/AB = YZ/BC = XZ/AC
If the shortest side of triangle XYZ is XZ, then the shortest side of triangle ABC is AC. Thus,
If XZ = 10 and AC = 20, then
10/20 = 1/2 = 0.5
Thus,
XY/AB = 0.5
13/AB = 0.5
AB = 13/0.5
AB = 26
YZ/BC = 0.5
12/BC = 0.5
BC = 12/0.5
BC = 24
Thus, the other side lengths of the triangle are 24 units and 26 units