Coordinate Proofs Geo H

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11 Terms

1
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parallelgram

use one of the following :

  1. diagonals bisect each other

  2. both pairs of opposite sides are parallel

  3. both pairs of opposite sides are congruent

  4. one pair of opposite sides are parallel and congruent

2
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Rectangle

One of ways to prove a parallelogram and one of the following :

  1. one right angle

  2. diagonals are congruent

3
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Rhombus

One of ways to prove a parallelogram and one of the following :

  1. Diagonals are perpendicular

  2. two adjacent sides are congruent

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Square

prove figure is a rectangle (you must prove parallelogram first) and two adjacent sides are congruent

or

prove figure is a rhombus (you must prove parallelogram first) and has one right angle

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Trapezoid

prove one pair of opposite sides are Parallel and the other pair of opposite sides are not parallel

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Isosceles Trapezoid

Prove the figure is a Trapezoid and one of the following:

  1. legs are congruent

  2. Diagonals are congruent

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Kite

prove 2 consecutive sides are congruent and opposite sides are not congruent

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to prove line segments are congruent

use distance formula / d= (x2-x1)2 + (y2-y1)2

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to prove lines parallel or perpendicular

use slope formula/

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to prove line segments bisect each other

use midpoint formula/ Mx= x1 + x2 / 2

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Right trapezoid

prove figure is a trapezoid and one leg is perpendicular to a base