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10 questions from this quiz
As an ordered pair (x,y)(x, y)(x,y)
It is always positive
Pythagoras theorem
d=(x1−x2)2+(y1−y2)2d = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}d=(x1−x2)2+(y1−y2)2
Because (x1−x2)2=(x2−x1)2(x_1 - x_2)^2 = (x_2 - x_1)^2(x1−x2)2=(x2−x1)2
9.59.59.5 units
Two possible values
AC=x2−x1AC = x_2 - x_1AC=x2−x1
Draw a sketch
y=−3y = -3y=−3 or y=21y = 21y=21
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