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SAI International School
Class : VI
Mathematics
Chapter - 5 – Understanding Elementary Shapes
Lesson Note – 5.4
Subtopics:
Classification of triangles
Types of Quadrilaterals
classification of triangles on the basis of their sides:
Equilateral triangle:
o An equilateral triangle is a triangle whose all three sides are equal.
o Here, XYZ is an equilateral triangle as XY = YZ = ZX.
Isosceles triangle:
o An isosceles triangle is a triangle whose any two sides are equal.
o The adjoining figure shows an isosceles triangle where XY = XZ.
Scalene triangle:
o In a scalene triangle, all the three sides are unequal.
