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In the 1600s, René Descartes married algebra and geometry to create the Cartesian plane.

I left my house and walked 800 meters north, before I reached the traffic intersection.

I then turned right, and walked a further 1500 meters east, to reach the amusement park.

I then turned right, and walked a further 1500 meters east, to reach the amusement park.

What is the straight-line distance (in meters) from my house to the amusement park?

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