## What is Coordinate Geometry?

The columns of the grid are given the letters A, B, C etc. The rows are numbered 1,2,3 etc. from the top. We can see that the X3 is in the box; That is, column D, row 3.

D and 3 are called the coordinates of the box. It has two parts: row and column. Each row has many boxes and each column has several boxes. But by having both, we can find a single box, where the row and column intersect.

**Coordinate Geometry Regulatory Symbol Rules**

Point position |
x-regulator sign |
y-regulator sign |
Regulatory Symbol |

In the first leg |
+ |
+ |
(+,+) |

Second leg |
– |
+ |
(-,+) |

In the third leg |
– |
– |
(-,-) |

In fourth leg |
+ |
– |
(+,-) |

### Coordinate geomerty.

(1) Regulatory sign rules = (0,0)

(2) What is the x-k regulator called? = abscissa

(3) What is the regulator of y ?=Grade

(4) Regulator or x coordinate of x axis = x, 0

(5) Regulator or coordinate of y axis = 0, y

(6) The formula for the distance from the point of origin = √ x² + y²

(7) Distance formula = √ (x1-x2) ² + (y1-y2) ²

(8) On the x-axis, y = 0.

(9) x = 0 on the y-axis