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1. |
Which assumption would you make to start an indirect proof of the statement Bob took the dog for a walk |
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A. |
Bob may take the dog for a walk. |
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B. |
Bob did not take the dog for a walk. |
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C. |
Bob does not have to take the dog for a walk. |
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D. |
Bob will take the dog for a walk. |
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Hint |
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2. |
State the assumption that could be used to start an indirect proof of the statement Points A, B, C, and O are coplanar. |
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A. |
Points A, B, C, and O are coplanar. |
B. |
Points A, B, C, and O are collinear. |
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C. |
Points A, B, C, and O are not coplanar. |
D. |
Points A, B, C, and O form a quadrilateral. |
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Hint |
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3. |
State the assumption that could be used to start an indirect proof of the statement m 1 + m2 = 180. |
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A. |
m1 and m2 are complementary. |
B. |
m1 + m2 = 90 |
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C. |
m1 + m2  180 |
D. |
m1 and m2 are supplementary. |
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Hint |
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4. |
State the assumption that could be used to start an indirect proof of the statement AB + BC > DE. |
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A. |
AB + BC = DE |
B. |
AB + BC DE |
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C. |
AB + BC < DE |
D. |
AB + BC DE |
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Hint |
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5. |
What is another name for an indirect proof? |
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A. |
proof by contradiction |
B. |
default proof |
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C. |
proof by assumption |
D. |
paragraph proof |
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Hint |
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