| |
| |
1. |
Order the steps for writing an indirect proof. |
| |
|
 |
| |
|
A. |
2, 1, 3 |
B. |
1, 2, 3 |
| |
|
C. |
3, 2, 1 |
D. |
2, 3, 1 |
| |
|
Hint |
|
| |
2. |
Which problem-solving strategy is used in indirect proofs? |
| |
|
A. |
decision-making |
B. |
guess and check |
| |
|
C. |
working backward |
D. |
draw a diagram |
| |
|
Hint |
|
| |
3. |
State the assumption that could be used to start an indirect proof of the statement Points A, B, C, and O are coplanar. |
| |
|
A. |
Points A, B, C, and O are collinear. |
B. |
Points A, B, C, and O form a quadrilateral. |
| |
|
C. |
Points A, B, C, and O are coplanar. |
D. |
Points A, B, C, and O are not coplanar. |
| |
|
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. |
proof by assumption |
B. |
proof by contradiction |
| |
|
C. |
paragraph proof |
D. |
default proof |
| |
|
Hint |
|
|
|