Given: 1. AB≅AC 4. $\angle$6≅$\angle$7 Reasons: 2. The base angles of an isosceles triangle are congruent. 3. Angles that meet to form a straight line are supplementary.
Work Step by Step
Statement 1 is given and statement two is true because ABC is an isosceles triangle. Statement 3 is true because the angles form straight lines which verifies statement 4.