15 ! answer as soon as possiblegiven: ab = ac ah = ak m∠bak = m∠cah prove: m∠k = m∠h△bah≅△    by   

In △BAH and △CAK

AB = AC   (Given congruent sides of triangle)

m∠BAK = m∠CAH ( Given congruent angles)

AH = AK   (Given congruent sides of triangle)

Therefore, triangle △BAH congruent to triangle △CAK.

△BAH ≅ △CAK by (Side Angle Sngle or SAS triangle congruency postulate).

Therefore, m∠K = m∠H  (Congurent parts of the congruent triangles are congruent).

corresponding angle is correct answer

Step-by-step explanation:

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