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Williamsburg High School for Architecture and Design

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You are here: Home / Teacher Posts / Geometry: Coordinate Geometry Proofs

Geometry: Coordinate Geometry Proofs

March 18, 2014 By Ms. Terraferma

How do you write coordinate geometry proofs.

1) You must know the distance formula, slope formula and midpoint formula.

2) You must know the key properties of the quadrilaterals.

Hint: USE the graph!!!

Click here for a review.

Click here for a video.

Common ways to show a quadrilateral is a….
•Parallelogram – Opposite sides are congruent and parallel
•Rectangle- Parallelogram with congruent diagonals (not perpendicular) & right angles
•Rhombus – Parallelogram with congruent sides and non congruent perpendicular diagonals
•Square – Parallelogram with congruent, perpendicular diagonals
•Isosceles Trapezoid – one pair of parallel sides and one pair of congruent non parallel sides. Diagonals not congruent

Download (PDF, 181KB)

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Ms. Terraferma

About Ms. Terraferma

Ms. Terraferma is the 10th and 12th grade guidance counselor. She can be reached at 718-388-1260 x3311 or terraferma@whsad.org.

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