The set of points (x,y) such that: a - δ ≤ x ≤ a + δ, b − δ ≤ y ≤ b + δ determines?
- A triangle
- A circle
- A square
- None of these
Explanation
The given inequalities define a region in the Cartesian plane:
a - δ ≤ x ≤ a + δ (horizontal bounds)
b - δ ≤ y ≤ b + δ (vertical bounds)
This region forms a square with:
Center at (a, b)
Side length of 2δ
The answer is A square.
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