TAILIEUCHUNG - Lecture General mathematics: Lecture 21 - Ms. Fehmida Haroon

Lecture present the particular antiderivatives and introduction to the area of a plane region. The main contents of this chapter include all of the following: Particular antiderivatives, application to rectilinear motion, introduction to the area of a plane region. | General Mathematics ADE 101 Unit 3 LECTURE No. 21 TRIANGLES Today’s Objectives Knowledge Test Triangle We get a TRIANGLE by joining three non collinear points . What is a TRIANGLE ? A closed figure formed by joining three line segments is called a TRIANGLE . A triangle has three sides A triangle has three angles TYPES OF TRIANGLES Two Ways On the basis of angles On the basis of sides On the basis of ANGLES Three types Acute angled triangle Right angled triangle Obtuse angled triangle Acute angled triangle A triangle whose all the angles are acute is called an ACUTE ANGLED TRIANGLE . Right angled triangle A triangle in which one of the angle is right angle is called RIGHT ANGLED TRIANGLE. Obtused angled triangle A triangle in which one of the angle is obtuse angle is called OBTUSED ANGLED TRIANGLE . On the basis of sides Three types Equilateral triangle Isosceles triangle Scalene triangle Equilateral triangle A triangle whose all the sides are of equal length is called equilateral triangle. Isosceles triangle A triangle whose any two sides are of equal measure is called scalene triangle. Scalene triangle A triangle whose no two sides are of equal measure is called scalene triangle. A closed figure formed by joining three non collinear points is called A triangle whose all the sides are of equal length is called A triangle whose no two sides are of equal length is called A triangle whose one angle is 90 degree is called A triangle whose all the angles are less than 90 degree is called Recap Isosceles Triangle Has at least two congruent sides Triangles Cut any shape triangle out of a sheet of paper Triangles Tear off the corners. Piece them together by having the corners touch. Triangles The corners form what type of angle? The sum of the angles of a triangle is 180 degrees Triangles To find a missing angle, add up the 2 given angles Triangles Subtract the sum from 180 and you have the missing angle Triangles Congruent Triangles Congruent Triangles Have the same SIZE

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• General mathematics
• Lecture General mathematics
• Geometric measurement
• Algebraic thinking
• Mathematical knowledge
• Constant functions
• Number pattern
• Cartesian coordinate system
• Liner equations
• Graph of liner equations
• Linear equation
• Natural numbers