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Mathematics 9 Online
OpenStudy (anonymous):

The two-column proof with missing statement proves the base angles of an isosceles triangle are congruent. Two-coulmn proof with missing statement. Statement 1: segment BD is an angle bisector of angle ABC. Reason 1: by Construction. Statement 2: angle ABD is congruent to angle DBC. Reason 2: Definition of an Angle Bisector. Statement 3: segment BD is congruent to segment BD. Reason 3: Reflexive Property. Statement 4: blank. Reason 4: Side-Angle-Side (SAS) Postulate. Statement 5: angle BAC is congruent to angle BCA. Reason 5: CPCTC.

OpenStudy (anonymous):

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