Proof: Congruent Triangles 4     

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

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