# Chapter1 - Reasoning in Geometry Reasoning 1.1 Patterns and...

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Reasoning in Geometry § 1.1 1.1 Patterns and Inductive Reasoning Patterns and Inductive Reasoning § 1.4 1.4 Conditional Statements and Their Converses Conditional Statements and Their Converses § 1.3 1.3 Postulates Postulates § 1.2 1.2 Points, Lines, and Planes Points, Lines, and Planes § 1.6 1.6 A Plan for Problem Solving § 1.5 1.5 Tools of the Trade

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2) Solve the equation. Check your answer. 5 Minute-Check 5 Minute-Check 1) Both answers can be calculated. Which one is right? What makes it right? What makes the other one incorrect? 30 6 3 2 = + X 20 6 3 2 = + X ( 29 ( 29 2 4 3 3 1 4 - = + x x 3) If a dart is thrown at the circle to the right, what is the probability that it will land in a yellow sector? The odds? total favorable P = e unfavorabl favorable O =
Find the value or values of the variable that makes each equation true. 1. 2. 3. 4. 5. 6. Find the next three terms of the sequence. 6, 12, 24, . . . 3 63 g = 12 7 67 x + = 2 2 32 y = 2 4 3 6 0 z z + + + = ( 29 If 4 and 3, what is the value of the expression 2 5 3 ? c d d c = = - g = 21 x = 5 y = 4 or y = - 4 z = - 2 6 48, 96, 192 5 Minute-Check 5 Minute-Check

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Patterns and Inductive Reasoning If you were to see dark, towering clouds approaching, you might want to take cover. Your past experience tells you that a thunderstorm is likely to happen. When you make a conclusion based on a pattern of examples or past events, you are using inductive reasoning . You will learn to identify patterns and use inductive reasoning.
Patterns and Inductive Reasoning You can use inductive reasoning to find the next terms in a sequence. Find the next three terms of the sequence: 3, 6, 12, X 2 X 2 24, 48, 96, X 2 X 2 X 2 Find the next three terms of the sequence: 7, 8, 11, + 3 + 1 16, + 5 + 7 + 9 32 23,

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Patterns and Inductive Reasoning Draw the next figure in the pattern.
Patterns and Inductive Reasoning A _________ is a conclusion that you reach based on inductive reasoning. In the following activity, you will make a conjecture about rectangles. conjecture 1) Draw several rectangles on your grid paper. 2) Draw the diagonals by connecting each corner with its opposite corner. Then measure the diagonals of each rectangle. 3) Record your data in a table d 1 = 7.5 in. d 2 = 7.5 in. Diagonal 1 Diagonal 2 Rectangle 1 7.5 inches 7.5 inches Make a conjecture about the diagonals of a rectangle

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Patterns and Inductive Reasoning A conjecture is an educated guess. Sometimes it may be true, and other times it may be false. How do you know whether a conjecture is true or false? Try different examples to test the conjecture. If you find one example that does not follow the conjecture, then the conjecture is false. Such a false example is called a _____________. counterexample Conjecture: The sum of two numbers is always greater than either number. Is the conjecture TRUE or FALSE ? Counterexample: -5 + 3 = - 2 - 2 is not greater than 3.
Patterns and Inductive Reasoning

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5 Minute-Check 5 Minute-Check Find the next three terms of each sequence.
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Chapter1 - Reasoning in Geometry Reasoning 1.1 Patterns and...

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