Question 1
Consider the relationship between:
P: Being a triangle
Q: Having three sides
Is P a necessary condition, sufficient condition, both, or neither for Q?
Step 1: Understand necessary and sufficient conditions
• P is NECESSARY for Q: Q cannot be true without P (Q → P)
• P is SUFFICIENT for Q: P being true guarantees Q (P → Q)
• P is BOTH: P if and only if Q (P ↔ Q)
Step 2: Analyze the relationship
P: Being a triangle
Q: Having three sides
Step 3: Determine the condition type
A shape is a triangle if and only if it has three sides
Answer: Necessary and sufficient
• P is NECESSARY for Q: Q cannot be true without P (Q → P)
• P is SUFFICIENT for Q: P being true guarantees Q (P → Q)
• P is BOTH: P if and only if Q (P ↔ Q)
Step 2: Analyze the relationship
P: Being a triangle
Q: Having three sides
Step 3: Determine the condition type
A shape is a triangle if and only if it has three sides
Answer: Necessary and sufficient