Can you please answer for 30 points Thanks

Answer:
Step-by-step explanation:
To find angle 3, we need to first find angle 2.
-It is given that it's a square. The full angle is 90°. Angle 2 would be 90-72, which is 18°.
Now that we have angle 2, we can find angle 3 because angle 2 and 3 are linear pairs.
180°-18°
162°
m<3=162°