Introduction - Coordinate System

Transcript

Introduction The chapter starts with a story about a boy named Reiaan to show why we need grids. The Challenge: Reiaan and his family have just moved to a new city, and he needs to settle into his new bedroom. Because Reiaan is visually impaired and unable to see, figuring out a new layout is a big challenge. The Solution: His sister, Shalini, decides to use a mathematical concept—coordinate geometry—to help him. She creates a physical map on a rectangular grid using pins and thick wool threads. How it Works: She lays out the floor plan using a scale where 1 cm on her grid equals 1 foot in real life. By feeling the pins and the wool connecting them, Reiaan can trace exactly where his bed, wardrobe, and bathroom are located.This story perfectly explains the purpose of a coordinate system: it is a structured framework that lets us use numbers to describe the exact physical locations of objects This story perfectly explains the purpose of a coordinate system: it is a structured framework that lets us use numbers to describe the exact physical locations of objects. Now, let’s look at how we find exact locations of points using the 2-D Cartesian Coordinate System