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Formulas Using the Coordinates of 2 Points

Formulas Using the Coordinates of 2 Points
Across
? = √(y2-y1)^2+(x2-x1)^2
_______ are congruent
? = y2-y1/x2-x1
A triangle that doesn't have equal sides
A triangle with the same sides
Down
(opp sides) If lines are _____ then their slopes are congruent
(diagonals) If lines are ____ then their slopes are congruent
? = (x1+x2/2 , y1+x2/2)
A triangle having two equal sides
______ are congruent