Proof: Congruent Triangles 4     
ray TV bisects UTW
ray TV is an altitude in TUW
TUW is isosceles
1. 
1. 
TUV TWV
ray TV bisects UTW
ray TV segment UW
ray TV is an altitude in TUW
TV = TV
segment TW segment TU
TVU = TVW (or TVU TVW)
TUW is isosceles
UTV WTV
TVU = 90; TVW = 90



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