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Analytic geometry

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Distance formulaDistance formulaMidpoint formulaMidpoint formulaDistance formula reviewMidpoint formula review
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Distance between two pointsGet 5 of 7 questions to level up!
Midpoint formulaGet 3 of 4 questions to level up!
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Dividing line segments: graphicalDividing line segments
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Divide line segmentsGet 3 of 4 questions to level up!
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Area of trapezoid on the coordinate planePoints inside/outside/on a circleChallenge problem: Points on two circlesCoordinate plane word problemClassifying quadrilaterals on the coordinate plane
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Area & perimeter on the coordinate planeGet 3 of 4 questions to level up!
Points inside/outside/on a circleGet 3 of 4 questions to level up!
Coordinate plane word problems: polygonsGet 3 of 4 questions to level up!
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Parallel & perpendicular lines introParallel & perpendicular lines from graph
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Parallel & perpendicular lines from graphGet 3 of 4 questions to level up!
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Parallel lines from equationParallel lines from equation (example 2)Parallel lines from equation (example 3)Perpendicular lines from equationWriting equations of perpendicular linesWriting equations of perpendicular lines (example 2)Proof: parallel lines have the same slopeProof: perpendicular lines have negative reciprocal slope
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About this unit

In analytic geometry, also known as coordinate geometry, we think about geometric objects on the coordinate plane. For example, we can see that opposite sides of a parallelogram are parallel by writing a linear equation for each side and seeing that the slopes are the same.