Proof: Parallelogram 5     

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GHJK GHJ = 60 line JKL LKG = 120
1.	1.
GHJ = JKG
JKL = 180
GHJ = 60
JKG = 60
180 = LKG + 60
GHJK
JKL = LKG + JKG
120 = LKG
line JKL

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