Find the perimetre of a polygon from its vertex coordinates
Find each side that runs across the grid. Its length is the number of units between its two matching coordinates. Add all the sides.
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Rectangle ABCD has vertices A(0, 3), B(5, 3), C(5, 1) and D(0, 1). What is its perimeter in units?
Answer: 14
Rectangle ABCD has vertices A(1, 5), B(2, 5), C(2, 1) and D(1, 1). What is its perimeter in units?
Answer: 10
The vertices of rectangle ABCD are A(4, 4), B(3, 4), C(3, 3) and D(4, 3). Find the perimeter of the rectangle.
Answer: 4
Tip: Find each side that runs across the grid. Its length is the number of units between its two matching coordinates. Add all the sides.
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