We say that two lines (on the same plane) are parallel to each other if they never intersect each other, ragardless of how far they are extended on either side. ... The angles Z3, Z4, Z5, Z6 are interior angles because they are on the inside of lines AB and CD.
B. A child appears to be running into the street ahead. It takes 2.3 seconds for the driver to react and begin to brake, but this time at a rate of -7.5 m/s2. What is the stopping distance for the car in this situation?
In Algebra, angles are measured counterclockwise (CCW), generally using the +x axis as a reference. Thus any angle with an arrow shown in the CW direction will have a negative measure.