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const2013 [10]
3 years ago
14

*urgent* Need Determine whether this quadrilateral must be a parallelogram

Mathematics
2 answers:
e-lub [12.9K]3 years ago
8 0
It must be a parallelogram because both sets of opposite angles are congruent and the sum of all angles equal 360°, meaning that both sets of opposite sides are parallel.
Ray Of Light [21]3 years ago
7 0

Isn't that a parallelogram?

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