14. In Figure 5, AB is parallel to CD, EF and GH. The parallel lines AB,...

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14. In Figure 5, AB is parallel to CD, EF and GH. The parallel lines AB, EF and GH intersect QR such that QX=XY=YR. SU= 9 cm, DU=8cm and TV=5 cm. Prove that angle TUV-90°. 14. In Figure 5, AB is parallel to CD, EF and GH. The parallel lines AB, EF and GH intersect QR such that QX=XY=YR. SU= 9 cm, DU=8cm and TV=5 cm. Prove that angle TUV-90°.