Introduction to Rectangular Coordinates — Coordinate Geometry (Secondary 1)

This GeoGebra applet introduces the fundamental concepts of the rectangular coordinate system. Through dynamic interaction, users can explore point locations within the coordinate plane, observe the structure of the axes and origin, understand quadrant divisions, and examine related polygon and vector representations. The applet features bilingual support with Chinese-English switching capability, making it accessible to a wider range of learners. It is designed as an intuitive visual teaching tool for beginners to grasp the composition of the two-dimensional coordinate plane, how points are represented by ordered pairs of coordinates, and how basic geometric figures can be expressed using coordinates. This interactive demonstration allows students to drag points, manipulate vectors, and observe real-time changes in coordinate values, deepening their conceptual understanding of how algebraic expressions and geometric shapes are connected. The applet serves as an excellent introductory resource for coordinate geometry, helping students transition from concrete visual reasoning to abstract mathematical thinking. It covers essential topics such as the placement of points in each quadrant based on the signs of their coordinates, the relationship between coordinates and geometric objects like line segments, polygons, and vectors, and the foundational principles of the Cartesian plane. Whether used in a classroom setting or for independent study, this applet provides an engaging and effective way for learners to build a solid foundation in analytical geometry.