Name _____________________________________ Class _____________ Date ____________
 Checkpoint Quiz 1
Use with Lessons 2-1 through 2-3.
Identify the hypothesis and conclusion of each conditional.
1. If
, then
.
2. If you want to get good grades in school,
you must study hard.
Show that each conditional is false by finding a counterexample.
3. If it is not January, then it must be June.
4. All vegetables are carrots.
Is each statement a good definition? If not, find a counterexample.
5. Two lines that do not intersect are parallel.
6. A rectangle is a four-sided figure with
four right angles.
If possible, use the Law of Detachment to draw a conclusion.
If this cannot be done, write not possible.
7. If a person lives in Dallas, then he or she lives
8. If three points are in the same plane,
in Texas. Allison lives in Texas.
they are coplanar. X, Y, and Z are in the
same plane.
Use the Law of Syllogism to draw a conclusion.
9. If you ran a good race, then your time is good.
10. If the car is old, then it must have a
If your time is good, then your coach is happy.
carburetor. If a car has a carburetor, then it
is not efficient.