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You know how to classify triangles based on the (i) sides (ii) angles. (i) Based on Sides: Scalene, Isosceles and Equilateral triangles. (ii) Based on Angles: Acute-angled, Obtuse-angled and Right-angled triangles.
You know that a closed figure formed by three intersecting lines is called a triangle. (‘Tri’ means ‘three’). A triangle has three sides, three angles and three vertices. For example, in triangle ABC, denoted as ∆ ABC (see Fig. 7.1); AB, BC, CA are the three sides, ∠ A, ∠ B, ∠ C are the three angles and A, B, C are three vertices.
In Geometry, a triangle is a three-sided polygon that consists of three edges and three vertices. The most important property of a triangle is that the sum of the internal angles of a triangle is equal to 180 degrees. This property is called angle sum property of triangle.
25 Ιαν 2024 · Triangle: A triangle is a simple closed curve made of three line segments. It has three vertices, three sides and three angles. Here in ΔABC, it has. Sides: AB¯, BC¯, CA¯. Vertices: A, B, C. Angles: ∠BAG, ∠ABC, ∠BCA. The side opposite to the vertex A is BC. The angle opposite to the side AB is ∠BCA. Classification of triangles based on sides.
23 Ιαν 2024 · CBSE Class 9 Maths Notes Chapter 5 Triangles. 1. Triangle: A closed figure formed by three intersecting lines is called a triangle (‘Tri’ means ‘three’). A triangle has three sides, three angles and three vertices. e.g., In triangle ABC, denoted as ∆ABC.
Special trigonometric angles, such as 30°, 45° and 60°, have specific trigonometric values that are widely used in various fields due to their simplicity and ease of calculation. These angles find application in numerous disciplines, from mathematics and physics to engineering and architecture.
In Class VI, you have learnt how to construct a circle, the perpendicular bisector of a line segment, angles of 30°, 45°, 60°, 90° and 120°, and the bisector of a given angle, without giving any justification for these constructions.
