Question

what is m∠1?
30°
1
40°
m∠1=°
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Explanation:

Step1: Use the exterior angle theorem

The exterior angle theorem states that an exterior angle of a triangle is equal to the sum of the two non - adjacent interior angles.

Step2: Calculate \(m\angle1\)

Here, the two non - adjacent interior angles are \(30^{\circ}\) and \(40^{\circ}\). So, \(m\angle1=30^{\circ}+40^{\circ}\)

Answer:

\(70\)