Question

1. a) 115° b) 85° c) 73° d) 80°

Explanation:

Step1: Identify the relationship between angles

When two parallel lines are cut by a transversal, corresponding angles are equal.

Step2: Determine the value of the unknown angle

The unknown angle and the \(85^{\circ}\) angle are corresponding angles. So, the unknown angle \(= 85^{\circ}\)

Answer:

B. \(85^{\circ}\)