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A student wrote the following sentences to prove that parallelogram ABCD has two pairs of opposite sides equal:

For triangles ABD and CDB, alternate interior angle ABD is congruent to angle CDB because AB and DC are parallel lines. Similarly, alternate interior angle ADB is equal to angle CBD because AD and BC are parallel lines. DB is equal to DB by reflexive property. Therefore, triangles ABD and CDB are congruent by _______________. Therefore, AB is congruent to DC and AD is congruent to BC by CPCTC.

Which phrase best completes the student's proof?

Respuesta :

trovezor

Answer:

ASA

Step-by-step explanation:

OK, I searched this question, but the question said What was his flaw.

SO if you happen to be in my shoes.

Pick "Triangles ABD and CDB are congruent by the ASA postulate instead of the SAS postulate."

Triangles ABD and CDB are congruent by ASA

What is the  ASA rule of congruency?

If any two angles and the side included between the angles of one triangle are equivalent to the corresponding two angles and side included between the angles of the second triangle, then the two triangles are said to be congruent by ASA rule.

To know more about congruency refer to :

https://brainly.com/question/20880990

#SPJ2

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