ProveIt! Two-Column Proofs Practice Tool

Proof: Parallelogram 5

pgram

GHJK

GHJ = 60 $\^o$

line JKL

LKG = 120 $\^o$

1.

1.

JKL = 180 $\^o$

JKG = 60 $\^o$

GHJ = 60 $\^o$

120 $\^o$ =

LKG

GHJ =

JKG

pgram

GHJK

JKL =

LKG +

JKG

180 $\^o$ =

LKG + 60 $\^o$

line JKL

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