Three figures exist such that ABCD≅GHIJ and BCDA≅RSTU. If GH is equal to 6 cm, HI is equal to 8 cm, IJ is equal to 10 cm, and GJ is equal to 9 cm, what is TS ?

From ABCD ≅ GHIJ, the matching vertices are A↔G, B↔H, C↔I, and D↔J. From BCDA ≅ RSTU, D↔T and C↔S, so TS corresponds to DC. Since DC corresponds to IJ and IJ = 10 cm, TS = 10 cm, the choice labeled 10 cm.

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