Is this statement true or false?
If two lines are perpendicular, then they form a right angle.
In the diagram below, lines a and b are parallel and cut by a transversal, t. If angle 1 is 100 degrees, find the measure of angle 4.
True....THAT is the definition of perpindicular
Angle 1 and agle 4 form a straight line ....they add to 180 degrees...so you should be able to calculate angle 4