Which angles are vertical angles and, therefore, congruent?
a d
a g
a e
a f

Answer:
a and f
Step-by-step explanation:
Vertical angles are directly opposite each other, created by two lines intersecting.
∠A and ∠F are congruent to each other because they are vertically opposite angles. Then the correct option is D.
The angle is the distance between the intersecting lines or surfaces. The angle is also expressed in degrees. The angle is 360 degrees for one complete spin.
Supplementary angle - Two angles are said to be supplementary angles if their sum is 180 degrees.
Vertically opposite angle - When two lines intersect, then their opposite angles are equal.
Linear angle - If the total of two angles is 180 degrees, they are said to be linear angles.
∠A and ∠F, ∠B and ∠E, ∠C and ∠H, and ∠D and ∠G are congruent to each other because they are vertically opposite angles.
Then the correct option is D.
More about the angled link is given below.
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