7 ∈ Sr (5) -->?
Lecturer Mathematics Past Papers and Syllabus / All — Multiple-choice practice
- A. None
- B. d(5,7) < r
- C. d(5,7) ≠ r
- D. d(5,7) > r
Correct answer
d(5,7) < r
Explanation
Explanation The notation 7 ∈ Sr (5) indicates that point 7 belongs to the circle Sr (5), which means it is on the circle. Since point 7 is on the circle, the distance between the center (point 5) and point 7 is equal to the radius r. The correct answer is d(5,7) < r.
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