E-STAR - Student

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Filename: drivers/Session_files_driver.php

Line Number: 137

Backtrace:

File: /home/estarbk/public_html/dev.estar-bk.com/application/controllers/Main.php
Line: 8
Function: __construct

File: /home/estarbk/public_html/dev.estar-bk.com/index.php
Line: 315
Function: require_once

Severity: Warning

Message: session_start(): Failed to initialize storage module: user (path: /var/cpanel/php/sessions/alt-php74)

Filename: Session/Session.php

Line Number: 137

Backtrace:

File: /home/estarbk/public_html/dev.estar-bk.com/application/controllers/Main.php
Line: 8
Function: __construct

File: /home/estarbk/public_html/dev.estar-bk.com/index.php
Line: 315
Function: require_once

Definition

A coordinate plane is a plane whose points have been placed in one- to-one correspondence with the set of ordered pairs of real numbers, ℝ × ℝ.

Distance in a Coordiante Plane

The distance |P₁P₂| between the points P₁ and P₂ with coordinates (x₁, y₁) and (x₂, y₂) respectively is given by

Proof: ΔP₁TP₂ is right with m(∠T) = 90^o

(Distance formula between P₁ and P₂)