Question

which angles are congruent to each other? ∠11 and ∠8 ∠1 and ∠3 ∠4 and ∠8 ∠7 and ∠10

Explanation:

Step1: Recall vertical - angle property

Vertical angles are congruent. When two lines intersect, the opposite angles are equal.

Step2: Identify vertical - angle pairs

In the given figure, \(\angle1\) and \(\angle3\) are vertical angles formed by the intersection of two lines.

Answer:

\(\angle1\) and \(\angle3\)