When proving that a quadrilateral is a parallelogram by using slopes you must find

the slopes of all four sides

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the slopes of two opposite sides

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the lengths of all four sides

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both the lengths and slopes of all four sides

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none of these

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Solution

The correct option is E both the lengths and slopes of all four sides
A parallelogram is a (non self-intersecting) quadrilateral with two pairs of parallel sides. The opposite or facing sides of a parallelogram are of equal length and the opposite angles of a parallelogram are of equal measure.
Option D is correct.

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Similar questions

Identify all the quadrilaterals that have

(a) four sides of equal length

(b) four right angles

Question 2 (a)
Identify all the quadrilaterals that have:

(a) Four sides of equal lengths.

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