1.
Order the steps for writing an indirect proof.
A.
2, 3, 1
B.
1, 2, 3
C.
3, 2, 1
D.
2, 1, 3
Hint
2.
Which assumption would you make to start an indirect proof of the statement Bob took the dog for a walk
A.
Bob does not have to take the dog for a walk.
B.
Bob did not take the dog for a walk.
C.
Bob will take the dog for a walk.
D.
Bob may take the dog for a walk.
Hint
3.
State the assumption that could be used to start an indirect proof of the statement
m
1 +
m
2 = 180.
A.
m
1 +
m
2 = 90
B.
m
1 +
m
2
180
C.
m
1 and
m
2 are complementary.
D.
m
1 and
m
2 are supplementary.
Hint
4.
State the assumption that could be used to start an indirect proof of the statement
AB
+
BC
>
DE
.
A.
AB
+
BC
DE
B.
AB
+
BC
DE
C.
AB
+
BC
=
DE
D.
AB
+
BC
<
DE
Hint
5.
What is another name for an indirect proof?
A.
default proof
B.
proof by contradiction
C.
proof by assumption
D.
paragraph proof
Hint