14.1: Coordinate Patterns
Plot points in your assigned quadrant and label them with their coordinates.
Let’s explore distance on the coordinate plane.
Plot points in your assigned quadrant and label them with their coordinates.
Next to each point, write its coordinates with the Text tool or Pen tool.
Answer these questions for each pair of points.
$A$ and $B$
$B$ and $D$
$A$ and $D$
Pause here for a class discussion.
Point $F$ has the same coordinates as point $C$, except its $y$-coordinate has the opposite sign.
Point $G$ has the same coordinates as point $E$, except its $x$-coordinate has the opposite sign.
Point $H$ has the same coordinates as point $B$, except both of its coordinates have the opposite signs. In which quadrant is point $H$?
Label each point with its coordinates.
Find the distance between each of the following pairs of points.
Point $B$ and $C$
Point $D$ and $B$
Point $D$ and $E$
Priya says, “There are exactly four points that are 3 units away from $(\text- 5, 0)$.” Lin says, “I think there are a whole bunch of points that are 3 units away from $(\text- 5, 0)$.”
The points $A = (5, 2), \,B = (\text-5, 2), \, C = (\text-5, \text-2)$, and $D=(5, \text-2)$ are shown in the plane. Notice that they all have almost the same coordinates, except the signs are different. They are all the same distance from each axis but are in different quadrants.
We can always tell which quadrant a point is located in by the signs of its coordinates.
$x$ | $y$ | quadrant | |
---|---|---|---|
row 1 | positive | positive | I |
row 2 | negative | positive | II |
row 3 | negative | negative | III |
row 4 | positive | negative | IV |
In general: