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Cartesian grid perimeter from coordinates

Teaching Transcript

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Find the perimeter of the shape on the Cartesian grid from its coordinates

To find the width, we notice that the X coordinates go from negative 2 to 3

So that's a width of 5

And for the height, the Y coordinates go from negative 4 to 3

So that's a height of 7

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.

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.

Skill Practice

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.