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Warm Up

Week 6. Warm Up. 09.20.11. m ∡ 9 = 33º. 8. 9. 7. 6. 1) What is m ∡ 7?. 2) What is m ∡ 8?. Converse Statement. Switch the hypothesis and the conclusion. If two segments are congruent then they have the same length. Statement:. Ex 1. Converse:.

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Warm Up

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  1. Week 6 Warm Up 09.20.11 m ∡ 9 = 33º 8 9 7 6 1) What is m ∡ 7? 2) What is m ∡ 8?

  2. Converse Statement Switch the hypothesis and the conclusion. If two segments are congruent then they have the same length. Statement: Ex 1 Converse: If two segments have the same length then they are congruent.

  3. 1 Ex 2 If ∡ 1 measures 136º, then ∡ 1 is obtuse. Statement: If ∡ 1 is obtuse, then ∡ 1 measures 136º. Converse:

  4. Inverse Negate the hypothesis and the conclusion. Ex 3 Statement: If the m∡ A = 40º, then it is acute. Inverse: If the m∡ A ≠ 40º, then it is not acute.

  5. Contra-positive Negate the hypothesis and the conclusion of the converse. If the m ∡ A = 40º, then it is acute. Ex 4 Statement: Converse: If ∡ A is acute, then m ∡ A = 40º. If ∡ A is not acute, then m∡ A ≠ 40º. Contra-positive:

  6. Ex 5

  7. Ex 5

  8. Ex 5

  9. Ex 5

  10. When there is a teacher’s meeting we are dismissed early. Ex 6 Original: If there is a teacher’s meeting, then we are dismissed early. If - then: If we are dismissed early, then there is a teacher’s meeting. Converse: If there is not a teacher’s meeting, then we are not dismissed early. Inverse: If we are not dismissed early, then there is not a teacher’s meeting. Contra-positive:

  11. Review Negation means to write the _______ of a statement. Do: 1 Write in if-then form, the converse, inverse, and contrapositive: When I hear thunder I see lightning. Assignment: Textbook Page 76, 18 – 24 All, 46 – 49 All, and 61 – 64 All.

  12. If it is summer, then school is out. Do: 1 Statement: If school is out, then it is summer. Converse: If it is not summer, Then school is not out. Inverse: If school is not out, Then it is not summer. Contra-positive:

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