The proof shows that abcd is a rectangle. which of the following is the missing reason?

a. angle-side-angle postulate
b. side-angle-side postulate
c. angle-angle-side postulate
d. side-side-side postulate

Side-side-side postulate

Step-by-step explanation:

In the first statement, we are given that AC = BD (1){It is given}

Now, in the second statement, we are given that AB = DC (2){ Because the parallelogram has equal opposite sides}

Now, again we are given that AD = DA (3) {From the symmetric property}

Now, conditions (1), (2), and (3) are applicable to say that Δ ABD and Δ ACD are congruent.

Since there are three sides involved to say Δ ABD ≅ Δ ACD, so it is by Side-side-side postulate. (Answer)

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nada

step-by-step explanation: