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In ∆ABC shown below, AB is congruent to BC.

Given: AB = BC. Prove:

Prove: The base angles of an isosceles triangle are congruent.

The two-column proof with missing statement proves the base angles of an isosceles triangle are congruent.

In ABC shown below AB is congruent to BC Given AB BC Prove Prove The base angles of an isosceles triangle are congruent The twocolumn proof with missing stateme class=

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meerkat18
I found the additional attachment of this problem.

The question was Which statement can be used to fill in the numbered blank space.

The number blank space is number 3 under the Statement column. The Reason column stated that number 3 is Reflexive property.
                                        __     __
The missing statement is BD ≡ BD

The above triangle can be divided into two equal triangle when we cut it along the line BD. Thus, the reflexive property of congruence. 

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