Complete the proof
given: abcd is a
parallelogram
ac bd
prove: abcd is a rectangle
reasons
a
statements
abcd is a
ncbd
ad bc
given
sss triangle
congruence theorem
срстс
mzdab = 90°
mzcba = 90°
the quad is a both
pairs of opposite sides are
congruent
“давс а двad
reflexive property
of congruence
consecutive angles in a
are supplementary
zdab = zcba
zdab and zcba
are supplementary
ab = ab
definition of
rectangle
7. congruent supp.
angles are right angles
8 abcd is a rectangle
undo
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