Angles congruent to ∠1 will be angles ∠4,∠5, ∠8.
From the diagram,
∠1 =∠4.....opposite angles
∠1 = ∠5.....corresponding angles.
∠5 = ∠8.....opposite angles.
So, ∠1 = ∠8
What are congruent angles?
Angles that are equal in magnitude are called congruent angles to each other.
So, ∠1 will be congruent to ∠4,∠5, ∠8.
Similarly, ∠2 will be congruent to ∠3,∠6,∠7.
∠7 will be congruent to ∠6,∠3,∠2.
∠6 will be congruent to ∠2,∠3,∠7.
Therefore, angles congruent to ∠1 will be ∠4,∠5, ∠8.
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