Proof: Congruent Triangles 4     

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ray TV bisects UTW ray TV is an altitude in TUW TUW is isosceles
1.	1.
ray TV segment UW
TUV TWV
ray TV bisects UTW
TVU = TVW (or TVU TVW)
TV = TV
TVU = 90; TVW = 90
segment TW segment TU
ray TV is an altitude in TUW
UTV WTV
TUW is isosceles

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ProveIt! by Michael Ferraro <mferraro@balstaff.org>.
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