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Larissa is writing a coordinate proof to show that the diagonals of a square are perpendicular to each other. She starts by assigning coordinates as given.

Larissa is writing a coordinate proof to show that the diagonals of a square are perpendicular-example-1
User GeoffreyB
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The slope of KH is 1

The slope of GJ is -1

The product of the slopes of the diagonals is -1

Therefore, KH is perpendicular to GJ

User Jeevan Bhatt
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