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Mathematics, 13.11.2020 20:40 nickname0097
The figure below shows a quadrilateral ABCD. Sides AB and DC are congruent and parallel:
A student wrote the following sentences to prove that quadrilateral ABCD is a parallelogram:
Side AB is parallel to side DC so the alternate interior angles, angle ABD and angle BDC, are congruent. Side AB is equal to side DC and DB is the side common to triangles ABD and BCD.
Therefore, the triangles ABD and CDB are congruent by
By CPCTC, angles DBC and ADB are congruent and sides AD and BC are congruent. Angle DBC and angle ADB form a
pair of alternate Interior angles. Therefore, AD is congruent and parallel to BC. Quadrilateral ABCD is a parallelogram because its opposite sides are equal and parallel.
Which phrase best completes the student's proof? (1 point)
AAS Postulate
HL Postulate
SAS Postulate
SSS Postulate
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The figure below shows a quadrilateral ABCD. Sides AB and DC are congruent and parallel:
A student...
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