Question

solve for the missing angle. b

Explanation:

Step1: Recall the sum of angles in a triangle

The sum of the interior angles of a triangle is \(180^{\circ}\).

Step2: Subtract the known angles from \(180^{\circ}\)

Let the missing angle be \(x\). We know one angle is \(90^{\circ}\) (right - angle) and another is \(40^{\circ}\). So \(x = 180^{\circ}-90^{\circ}-40^{\circ}\).

$$x=180^{\circ}-(90^{\circ} + 40^{\circ})=180^{\circ}-130^{\circ}=50^{\circ}$$

Answer:

\(50^{\circ}\)