Question

what is m∠1? m∠1 =

Explanation:

Step1: Recall angle - sum property of a triangle

The sum of interior angles of a triangle is 180°.

Step2: Identify known angles

Let's assume the angles of the triangle are ∠1, 20°, and 40°.

Step3: Calculate ∠1

We know that ∠1+20° + 40°=180°. So, ∠1=180°-(20° + 40°)=120°.

Answer:

120