The relationship between the slopes of the parallel sides is m₁ = m₂.
The relationship between the lengths of the non-parallel sides is perpendicular or intersecting.
How to find the slope of a line?
The slope of a line can be calculated by taking the tangent ratio of the angle formed by it with the x axis.
The angle between two parallel lines is zero.
This implies that they form same angle with the x-axis.
The slopes of two parallel lines are always equal to each other.
Since, the slope of a line is the tangent of the angle made by it with x axis.
Then, it can be written as m₁ = m₂.
Hence, the relationship between the lengths of the non-parallel sides;
perpendicular or intersecting.
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