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Discussion OF work sheet -1 || Triangle ...

Discussion OF work sheet -1 || Triangle definition || Type OF Triangle|| Scalene Triangle Isosceles triangle || Equilateral triangle|| Acute angle triangle|| Right angle traingle Obtuse triangle || Some important theorem and their proOF example|| Exterior angle Theorem proOF

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Explain the following terms: Triangle (ii) parts or elements of a triangle Scalene triangle (iv) isosceles triangle Equilateral triangle (vi) acute triangle Right triangle (viii) obtuse triangle Interior of a triangle (x) exterior of a triangle.

A triangle having all sides of different length is known as scalene triangle (b) isosceles triangle an equilateral triangle (d) an acute triangle

A triangle whose all sides are equal is called an equilateral triangle (b) an acute triangle a right triangle (d) an isosceles triangle

Right triangle a triangle whose one angle is a right angle is called a right-angled triangle or a right triangle.

A triangle whose one angle is more than 90^(@) is called a scalene triangle (b) a right triangle an acute triangle (d) an obtuse triangle

A right triangle cannot have an obtuse angle.

Obtuse triangle a triangle whose one angle is obtuse is called an obtuse-angled triangle or an obtuse triangle.

The straight lines x +y=0, 5x + y= 4 and x+5y=4 form (A) an isosceles triangle (B) an equilateral triangle (C) a scalene triangle (D) a right angled triangle

RIGHT TRIANGLE A triangle whole one angle is a right angle is called a right-angled triangle or right triangle.