Classify the following triangles based on the length of their sides.

1.	Classify the following triangles based on the length of their sides.
Answer» i) In ∆ABC, AB ≠ BC ≠ AC So, ∆ABC is scalene triangle. ii) In ∆DEF, DE = EF = FD = 2 cm So, ∆DEF is an equilateral triangle. iii) In ∆XYZ, XZ = YZ = 3.5 cm So, ∆XYZ is an isosceles triangle. iv) Isosceles triangle (∵ Two sides are equal) v) Equilateral triangle (∵ Three sides are equal) vi) Scalene triangle (∵ NO two sides are equal).

Answer»

i) In ∆ABC,

AB ≠ BC ≠ AC

So, ∆ABC is scalene triangle.

ii) In ∆DEF,

DE = EF = FD = 2 cm

So, ∆DEF is an equilateral triangle.

iii) In ∆XYZ,

XZ = YZ = 3.5 cm

So, ∆XYZ is an isosceles triangle.

iv) Isosceles triangle (∵ Two sides are equal)

v) Equilateral triangle (∵ Three sides are equal)

vi) Scalene triangle (∵ NO two sides are equal).

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