Question

Melissa's proof

Answer 1

Answer:

Last one, triangles AOB and COD

Step-by-step explanation:

In step 3, they are talking about the side/angle/side postulate. That helps in describing a triangle, therefore she must be talking about a triangle

Answer 2

Answer:

AOB and COD

Step-by-step explanation:

got the same question that was missing a different part

For triangles AOB and COD, angle 1 is equal to angle 2, as they are vertical angles.

AO = OC and BO = OD because it is given that diagonals bisect each other.

The triangles AOB and COD are congruent by SAS postulate.

Similarly, triangles AOD and COB are congruent.

By ________, angle ABD is equal to angle CDB and angle ADB is equal to angle CBD.

As the alternate interior angles are congruent, the opposite sides of quadrilateral ABCD are parallel.

Therefore, ABCD is a parallelogram.