7th Grade · Expressions & Equations
Closed Circle
7.EE.B.4b
Definition
Placed at the boundary value of an inequality that uses ≤ or ≥. The boundary point IS included in the solution set.
Examples
- x ≥ 4 — the boundary 4 IS included.
- x ≤ -1 — the boundary -1 IS included.
Key rule
See an equals bar in the inequality sign? Yes means closed circle.
Memory hook
Closed circle = the boundary counts.