# Coordinate Geometry

## Overview

Welcome to the course material on Coordinate Geometry in General Mathematics. Coordinate Geometry is a fundamental branch of mathematics that combines algebraic techniques with geometry to study geometric shapes using coordinates. In this course, we will delve into various concepts and applications of coordinate geometry, providing a solid foundation for solving geometric problems in the coordinate plane.

One of the primary objectives of this course is to enable students to determine the midpoint and gradient of a line segment. Understanding how to find the midpoint of a line segment is crucial in dividing the line into two equal parts. Additionally, calculating the gradient allows us to understand the slope or inclination of the line, providing valuable information about its direction and steepness.

Another essential objective of this course is finding the distance between two points in the coordinate plane. By utilizing the distance formula derived from the Pythagorean theorem, students will learn to calculate the distance between any two points in a Cartesian plane. This skill is vital in various real-life applications, such as navigation and optimization.

Furthermore, this course will cover the conditions for parallelism and perpendicularity in lines. Identifying when two lines are parallel or perpendicular is crucial for understanding the relationships between different geometric elements. Through clear explanations and examples, students will grasp the criteria that determine parallel and perpendicular lines in the coordinate plane.

Moreover, students will explore how to find the equation of a line using different forms, including the two-point form, point-slope form, slope-intercept form, and general form. This knowledge is essential for representing lines algebraically and geometrically, allowing for precise calculations and analysis of linear relationships.

Throughout this course on Coordinate Geometry, students will engage with various subtopics, such as properties of angles and lines, polygons, circles, constructions, lengths and areas of plane geometrical figures, and more. By combining geometric principles with algebraic techniques, students will develop a robust skill set that can be applied to solve a wide range of geometric problems.

By the end of this course, students will have a comprehensive understanding of Coordinate Geometry, equipping them with the necessary skills to analyze geometric shapes, solve complex problems, and make connections between algebra and geometry in the coordinate plane. Let's embark on this journey of exploration and discovery in the fascinating realm of Coordinate Geometry!

## Objectives

1. Express Equations of Straight Lines in Slope-Intercept Form
2. Determine the Midpoint of a Line Segment
3. Find the Gradient of a Line Segment
4. Derive Equations of Straight Lines in Two-Point Form
5. Formulate Equations of Straight Lines in Point-Slope Form
6. Identify Conditions for Parallel and Perpendicular Lines
7. Calculate the Distance Between Two Points
8. Determine Equations of Straight Lines in General Form

## Lesson Note

Coordinate Geometry, also known as Analytic Geometry, is a branch of mathematics that studies geometric figures through algebraic representation using a coordinate system. It bridges the gap between Algebra and Geometry by describing geometric shapes using algebraic equations. In this course, we will delve into the fundamental concepts and techniques used to analyze geometric properties and relationships.

## Lesson Evaluation

Congratulations on completing the lesson on Coordinate Geometry. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.

You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.

Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.

1. Find the equation of the line passing through the points A(2, 3) and B(4, 7). A. y = 2x + 7 B. y = 4x - 1 C. y = 2x - 3 D. y = 2x + 1 Answer: B. y = 4x - 1
2. Find the midpoint of the line segment with endpoints P(3, 5) and Q(9, -1). A. (6, 0) B. (6, 3) C. (3, 2) D. (12, -3) Answer: A. (6, 0)
3. If a line passes through points C(4, 6) and D(2, 10), what is the gradient of the line? A. -1 B. 1 C. -2 D. 2 Answer: C. -2
4. Calculate the distance between points E(1, 3) and F(7, 4). A. √17 B. √26 C. √29 D. √34 Answer: B. √26
5. Which of the following points lies on the line with equation y = 2x + 3? A. (3, 8) B. (-2, -1) C. (0, 3) D. (-1, 1) Answer: C. (0, 3)
6. What is the equation of the line passing through points G(1, 5) and H(3, -1)? A. y = 2x + 3 B. y = -3x + 6 C. y = -3x + 8 D. y = 6x - 1 Answer: B. y = -3x + 6
7. If points M(2, 2), N(4, 4), and P(6, 6) are collinear, what can you say about the slopes of the lines formed by these points? A. Slope of MN = Slope of NP B. Slope of MN = - Slope of NP C. Slope of MN = 0 D. Slope of MN = 1 Answer: D. Slope of MN = 1
8. Determine the equation of the line perpendicular to y = 3x - 2 passing through the point (2, -4). A. y = -3x - 2 B. y = -1/3x - 4 C. y = 1/3x - 4 D. y = 3x + 2 Answer: B. y = -1/3x - 4
9. Given the points R(4, -3) and S(-1, 7), what type of angle is formed between the line passing through these points and the x-axis? A. Acute angle B. Right angle C. Obtuse angle D. Straight angle Answer: C. Obtuse angle

## Past Questions

Wondering what past questions for this topic looks like? Here are a number of questions about Coordinate Geometry from previous years

Question 1

In the diagram above, AO is perpendicular to OB. Find x

Question 1

Determine the area of the region bounded by:

Question 1

A ship sails 6km from a port on a bearing 070° and then 8km on a bearing of 040°. Find the distance from the port.

Practice a number of Coordinate Geometry past questions