Given:
[tex]\angle3=40\degree[/tex]
Required:
[tex]\text{ We need to find }\angle2.[/tex]
Explanation:
[tex]We\text{ know that }\angle3\text{ and }\angle2\text{ are alternate interior angles.}[/tex]
Alternate interior angles are equal in the parallel line.
[tex]\angle2=\angle3[/tex]
[tex]Substitute\text{ }\angle3=40\degree\text{ in the equation.}[/tex]
[tex]\angle2=40\degree[/tex]
Final answer:
[tex]\angle2=40\degree[/tex]
