Isosceles Triangle, using distance formula, prove that two sides are congruent., Right Triangle, using slope formula, prove that two sides are perpendicular (right angle)., Equilateral Triangle & Rhombus, using distance formula, prove that all sides are congruent., Parallelogram, using distance formula, prove that opposite sides are congruent., Isosceles Trapezoid, using slope formula, prove one pair of sides is parallel (same slope), and the other pair is not (different slope). using distance formula, prove the non-parallel sides are congruent, Rectangle, using distance formula, prove that opposite sides are congruent (parallelogram) AND diagonals are congruent., Square, using distance formula, prove that all sides are congruent. using distance formula, prove that diagonals are congruent., Trapezoid, using slope formula, prove one pair of sides is parallel (same slope), and and other pair is not (different slope).

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