Logic worksheet focusing on identifying inverse, converse, and contrapositive of if-then statements.
Worksheet with logic exercises on inverse, converse, and contrapositive statements for geometry and logic practice.
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Step-by-step solution for: I. Directions: Determine if each statement is the inverse ...
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Show Answer Key & Explanations
Step-by-step solution for: I. Directions: Determine if each statement is the inverse ...
Here are the solutions to your worksheet.
First Statement: "If you study hard, then your scores will improve."
* P (Hypothesis): You study hard.
* Q (Conclusion): Your scores will improve.
1. "If your scores improved, then you studied hard."
* This switches the order ($q \rightarrow p$).
* Answer: Converse
2. "If you do not study hard, then your scores will not improve."
* This negates both parts but keeps the order ($\sim p \rightarrow \sim q$).
* Answer: Inverse
3. "If your scores did not improve, then you did not study hard."
* This switches the order and negates both parts ($\sim q \rightarrow \sim p$).
* Answer: Contrapositive
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Second Statement: "If an angle measures $90^\circ$, then it is called a right angle."
* P (Hypothesis): An angle measures $90^\circ$.
* Q (Conclusion): It is called a right angle.
4. "If an angle doesn't measure $90^\circ$, then it is not called a right angle."
* This negates both parts but keeps the order ($\sim p \rightarrow \sim q$).
* Answer: Inverse
5. "If an angle is not called a right angle, then it doesn't measure $90^\circ$."
* This switches the order and negates both parts ($\sim q \rightarrow \sim p$).
* Answer: Contrapositive
6. "If an angle is called a right angle, then it measures $90^\circ$."
* This switches the order ($q \rightarrow p$).
* Answer: Converse
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Statement 1: "If you are patient and persistent, then you will succeed."
* Inverse (Negate both parts): If you are not patient and persistent, then you will not succeed.
* Converse (Switch the parts): If you succeed, then you are patient and persistent.
* Contrapositive (Switch and negate both parts): If you do not succeed, then you are not patient and persistent.
***
Statement 2: "If a triangle is equilateral, then it is equiangular."
* Inverse (Negate both parts): If a triangle is not equilateral, then it is not equiangular.
* Converse (Switch the parts): If a triangle is equiangular, then it is equilateral.
* Contrapositive (Switch and negate both parts): If a triangle is not equiangular, then it is not equilateral.
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Final Answer:
I. Directions:
1. Converse
2. Inverse
3. Contrapositive
4. Inverse
5. Contrapositive
6. Converse
II. Directions:
| IF-THEN STATEMENT | INVERSE | CONVERSE | CONTRAPOSITIVE |
| :--- | :--- | :--- | :--- |
| If you are patient and persistent, then you will succeed. | If you are not patient and persistent, then you will not succeed. | If you succeed, then you are patient and persistent. | If you do not succeed, then you are not patient and persistent. |
| If a triangle is equilateral, then it is equiangular. | If a triangle is not equilateral, then it is not equiangular. | If a triangle is equiangular, then it is equilateral. | If a triangle is not equiangular, then it is not equilateral. |
Part I: Determine if each statement is the inverse, converse, or contrapositive.
First Statement: "If you study hard, then your scores will improve."
* P (Hypothesis): You study hard.
* Q (Conclusion): Your scores will improve.
1. "If your scores improved, then you studied hard."
* This switches the order ($q \rightarrow p$).
* Answer: Converse
2. "If you do not study hard, then your scores will not improve."
* This negates both parts but keeps the order ($\sim p \rightarrow \sim q$).
* Answer: Inverse
3. "If your scores did not improve, then you did not study hard."
* This switches the order and negates both parts ($\sim q \rightarrow \sim p$).
* Answer: Contrapositive
***
Second Statement: "If an angle measures $90^\circ$, then it is called a right angle."
* P (Hypothesis): An angle measures $90^\circ$.
* Q (Conclusion): It is called a right angle.
4. "If an angle doesn't measure $90^\circ$, then it is not called a right angle."
* This negates both parts but keeps the order ($\sim p \rightarrow \sim q$).
* Answer: Inverse
5. "If an angle is not called a right angle, then it doesn't measure $90^\circ$."
* This switches the order and negates both parts ($\sim q \rightarrow \sim p$).
* Answer: Contrapositive
6. "If an angle is called a right angle, then it measures $90^\circ$."
* This switches the order ($q \rightarrow p$).
* Answer: Converse
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Part II: Transform the given statements.
Statement 1: "If you are patient and persistent, then you will succeed."
* Inverse (Negate both parts): If you are not patient and persistent, then you will not succeed.
* Converse (Switch the parts): If you succeed, then you are patient and persistent.
* Contrapositive (Switch and negate both parts): If you do not succeed, then you are not patient and persistent.
***
Statement 2: "If a triangle is equilateral, then it is equiangular."
* Inverse (Negate both parts): If a triangle is not equilateral, then it is not equiangular.
* Converse (Switch the parts): If a triangle is equiangular, then it is equilateral.
* Contrapositive (Switch and negate both parts): If a triangle is not equiangular, then it is not equilateral.
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Final Answer:
I. Directions:
1. Converse
2. Inverse
3. Contrapositive
4. Inverse
5. Contrapositive
6. Converse
II. Directions:
| IF-THEN STATEMENT | INVERSE | CONVERSE | CONTRAPOSITIVE |
| :--- | :--- | :--- | :--- |
| If you are patient and persistent, then you will succeed. | If you are not patient and persistent, then you will not succeed. | If you succeed, then you are patient and persistent. | If you do not succeed, then you are not patient and persistent. |
| If a triangle is equilateral, then it is equiangular. | If a triangle is not equilateral, then it is not equiangular. | If a triangle is equiangular, then it is equilateral. | If a triangle is not equiangular, then it is not equilateral. |
Parent Tip: Review the logic above to help your child master the concept of converse inverse contrapositive worksheet with answers.