Which formula (by name) is used to establish that
a) two lines are parallel?
b) two line segments are congruent?
(a)
To find:
The formula used to establish that two lines are parallel.
If two lines are parallel, then their slopes are equal.
Let the slope of line 1 be
Let the slope of line 2 be
(b)
To find:
The formula used to establish that two lines are congruent.
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