Overview
Exercise 17.1
Exercise 17.2
Exercise 17.3
Exercise 17.4
Exercise 17.5
Review Exercise
MCQ’s
Unit 17 of Class 9 Mathematics focuses on Practical Geometry, specifically concerning Triangles. This unit teaches students how to construct triangles accurately using a compass and a ruler, based on given measurements.
Key Concepts:
- Triangle Construction: Students learn various methods for constructing triangles, including:
- Constructing a triangle when all three sides are given (SSS).
- Constructing a triangle when two sides and the included angle are given (SAS).
- Constructing a triangle when two angles and the included side are given (ASA).
- Constructing a triangle when two angles and a non-included side are given (AAS).
- Properties of Triangles: The unit reinforces knowledge of different types of triangles (e.g., scalene, isosceles, equilateral) and their properties.
- Applications: Practical applications of triangle constructions are discussed, helping students understand how geometry is used in real-world contexts.
This unit is essential for developing skills in geometric construction, critical thinking, and spatial reasoning, laying a foundation for further studies in geometry.