Answer:
angle 1 = 51°, angle 2 = 39°, angle 3 = 90°
Step-by-step explanation:
Arrows on lines are used to indicate that those lines are parallel.
As the opposite lines are parallel, this indicates that angles 39° and angle 2 are alternate, which means they are equal. So angle 2 = 39°
As the opposite lines are parallel, and we are given one of the interior corner angles as a right angle (90°), this means that all corner angles of the rectangle are 90°. Therefore, angle 1 = 90° - angle 2 = 90 - 39 = 51°
Angle 3 is opposite to the right angle. As the lines are parallel, angle 3 = 90°
