Given: In triangle ABC, ∠B ≅ ∠C Prove: AB ≅ ACTriangle A B C is shown. Angles A B C and B C A are congruent. Complete the paragraph proof. We are given that ∠B ≅ ∠C. Assume segment AB is not congruent to segment AC . If AB > AC, then m∠C > m∠B by the . If AB < AC, then m∠C < m∠B by the converse of the triangle parts relationship theorem. But by the definition of congruent, we know the measure of angle B equals the measure of by the given statement. Therefore, we have a contradiction: AB = AC, and AB ≅ AC.
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How will the emission of an alpha particle affect the atomic number of an atom
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