This math skill teaches how to calculate the perimeter of a shape on a Cartesian grid using its coordinates. By identifying the smallest and largest X and Y coordinates, one can determine the shape’s width and height, respectively. The perimeter is then calculated by applying the formula for the perimeter of a rectangle.
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Cartesian grid perimeter from coordinates
Test your understanding of cartesian grid perimeter from coordinates by practicing it! Work through the below exercises to use it in practice.
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Find the perimeter of the shape on the Cartesian grid from its coordinates
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To find the width, we notice that the X coordinates go from negative 2 to 3
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So that's a width of 5
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And for the height, the Y coordinates go from negative 4 to 3
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So that's a height of 7
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Our shape is a rectangle, so the perimeter is twice the sum of width and height, which is 24. This approach works for any shape as you can find the dimensions from the grid.