Date Name
3.1
Notetaking with Vocabulary (continued)
Extra Practice
In Exercises 1-4, think of each segment in the diagram as part of a line.
Which line(s) or plane(s) contain point B and appear to fit the description?
1. line(s) skew to FG.
F
2. line(s) perpendicular to FG.
E
ZH
3. line(s) parallel to FG.
D
4. plane(s) parallel to plane FGH.

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?