Question

topic 4 - 2: do now
what is ( mangle b )?
121
67
59
53

Explanation:

Step1: Recall the triangle - angle sum theorem

The sum of the interior angles of a triangle is \(180^{\circ}\). Let \(\angle A = 84^{\circ}\), \(\angle C=37^{\circ}\), and \(\angle B\) be the unknown angle. Then the formula is \(\angle A+\angle B+\angle C = 180^{\circ}\).

Step2: Solve for \(\angle B\)

Substitute the values of \(\angle A\) and \(\angle C\) into the formula: \(\angle B=180^{\circ}-\angle A - \angle C\).

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Answer:

\(59\)