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