Coordinate-based perimeter
Perimeter is the total length around the boundary of a figure drawn using coordinates.
Practice This ConceptMain explanation
Teacher explanation
To find perimeter on a coordinate plane, calculate each side length with the distance formula and then add them all. The key idea is to walk around the outside edge, not across the figure. This concept often appears in triangle and quadrilateral questions.
Example
If a triangle has side lengths 3, 4, and 5 units, its perimeter is 12 units.
Simple analogy
Perimeter means the full walk around the shape.
Common confusion
Students sometimes add coordinates or only two sides instead of adding every side around the shape.
Exam tip
Write the side lengths one by one in order around the figure, then add them at the end.
Answer writing and exam use
1-mark use
Write the exact meaning of coordinate-based perimeter in one clean line.
2-mark use
Define coordinate-based perimeter and add one example or condition.
3-mark use
Explain coordinate-based perimeter, show the method or example, and mention the common mistake.
Practice this concept with focused MCQs
Open the concept quiz intro first, review the test details, and then start a focused MCQ set from this concept only. Instant score and answer review are live now.
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