Proof: Parallelogram 5
GHJK
GHJ = 60
line JKL
LKG = 120
1.
1.
GHJK
JKL =
LKG +
JKG
GHJ =
JKG
GHJ = 60
JKG = 60
line JKL
180
=
LKG + 60
JKL = 180
120
=
LKG
ProveIt!
by Michael Ferraro <
mferraro@balstaff.org
>.
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