Last updated on Sep 21, 2026

Cartesian Plane/Coordinates (Junior Cert Mathematics): Flashcards

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Cartesian Plane/Coordinates

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Definition of Cartesian Plane

A map that helps us find the location of points

The $x$ -axis direction

Horizontal line (left and right)

The $y$ -axis direction

Vertical line (up and down)

Coordinates of the origin

$(0, 0)$

Format for writing coordinates

$(x, y)$

$x$ -coordinate meaning

Distance left or right from origin

$y$ -coordinate meaning

Distance up or down

Direction for positive $x$ -coordinate

Right

Direction for negative $x$ -coordinate

Left

Direction for positive $y$ -coordinate

Up

Direction for negative $y$ -coordinate

Down

Order of movement when plotting points

$x$ -axis first, then $y$ -axis

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Parallel/Perpendicular Lines

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Parallel/Perpendicular Lines

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Parallel/Perpendicular Lines

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Parallel/Perpendicular Lines

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