Copy of Naming Angle Positions
Definition: A transversal is a line that intersects 2 other lines at 2 distinct points.
In the applet, the dashed line below is a transversal. (Actually, each of the three lines displayed below is a transversal.)
When a transversal intersects 2 other lines, special names are given to certain pairs of angles.
These angle pairs are called corresponding angles, alternate interior angles, alternate exterior angles, same-side interior angles, and same-side exterior angles.
Explore these angle pairs within the applet below. Then, answer the questions that follow.
Questions:
1) What does the term "same-side" mean in the phrases "same-side interior angles" and "same-side exterior angles"?
It means one is inside and one is outside
2) What does the term "alternate" mean in the phrases "alternate interior angles" and "alternate exterior angles"?
It means that they're on the same transversal line but just on opposite sides
3) Which of the four displayed angles would be considered "interior" angles? Why is this?
Same side interior angles because both angles on are the same side transversal line and for a C shape on both sides
4) Which of the four displayed angles would be considered "exterior" angles? Why is this?
The first one because both angles are on the outside line which is the exterior angle that forms a I shape.
5) How would you describe, in your own words, what it means for a pair of angles to be described as "corresponding angles"?
One is on the exterior line and the other angle is on the interior line and both are on the same side of the transversal line