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1 It's a 2 dimensional 3 sided shape

2 It belongs to the class of polygons known as triangles

3 Its sides are equal in length

4 It has 3 equal interior angles each measuring 60 degrees

5 It has 3 equal exterior angles each measuring 120 degrees

6 It has no diagonals

7 It has 3 lines of mirror symmetry

8 It has rotational symmetry to the order of 3

9 It has a perimeter which is the sum of its 3 sides

10 It has an area which is 0.5*base*height

11 Its area can also be calculated as 0.5*side squared*sin(60)

12 It can be split into 2 right angle triangles

13 It can be used in conjunction with Pythagoras' theorem

14 It can be doubled up into a quadrilateral

15 It can be circumscribed within a cicle

16 Its classification is also known as a regular polygon

17 Its best friend is the equilateral triangular pyramid

18 It can be subjected to trigonometry

19 It's always congruent or similar to other equilateral triangles

20 It can be subjected to algebra

21 Its main claim to fame is that as a triangle other polygons are made from it
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