Question

calculate m∠abc.

Explanation:

Step1: Analyze the composition of \(\angle ABC\)

\(\angle ABC\) is composed of two angles, \(45^{\circ}\) and \(60^{\circ}\).

Step2: Calculate the measure of \(\angle ABC\)

According to the angle - addition principle, \(m\angle ABC=45^{\circ}+60^{\circ}\).

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Answer:

\(105^{\circ}\)