Question

find the value of $b$.

1. $b^{\circ}=?$

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.
$$b^{\circ}=52^{\circ}+48^{\circ}$$

Step2: Calculate the sum

Add the two angles together.
$$b^{\circ}=100^{\circ}$$

Answer:

\(100^{\circ}\) (the third option)