<1 and <2 are adjacent angles.
a.) True
b.) False

Answer:
True, ∠1 and ∠2 are adjacent angles. True
Explanation:
Definition of adjacent angles: Two angles are called adjacent angles if
1. They have a common side
2. Common vertex (corner point)
3. They don't overlap.
Further Explanation:
In the given figure two lines are intersecting each other and form 4 angles, ∠1, ∠2, ∠3 and ∠4.
From the given figure it is clear that, the common vertex of all angles is the point of intersection of both lines. The pairs of adjacent angles are
(i) ∠1 and ∠2
(ii) ∠2 and ∠3
(iii) ∠3 and ∠4
(iv) ∠1 and ∠4
Therefore, ∠1 and ∠2 are adjacent angles and the given statement is true.
Learn More:
Adjacent angles : https://brainly.com/question/11933939 (Answered by MollieToliver)
Adjacent angles : https://brainly.com/question/12256805 (Answered by ApusApus)
Keywords:
Adjacent angles, Intersection of two lines.
When we have an intersection of two lines, four angles are created in that intersection.
With this, we define two adjacent angles as a pair of angles that is separated by one of the lines.
In the image, we can see that:
∠1 and ∠2 are adjacent
∠2 and ∠3 are adjacent
∠3 and ∠4 are adjacent
∠4 and ∠1 are adjacent.
Then the statement:
"∠1 and ∠2 are adjacent"
Is true, by definition of adjacent angles.
If you want to learn more, you can read:
https://brainly.com/question/12838185