1. All about Triangles
Ask Boffin!

2. An Equilateral Triangle

3. How many lines of symmetry has an Equilateral Triangle got?1 2 3

4. Properties of an Equilateral Triangle
Has 3 equal sides
Has 3 equal angles
Each angle is a 60o angle
Has 3 lines of symmetry
Is a regular shape

5. What type of triangle is this?

6. An Isosceles Triangle

7. How many lines of symmetry has an Isosceles Triangle got?1

8. Properties of an Isosceles Triangle
Has 2 equal sides
Has 2 equal angles
Has 1 line of symmetry
Is an irregular shape

9. What type of triangle is this?

10. A Scalene Triangle

11. How many lines of symmetry has a Scalene Triangle got?
None!

12. Properties of an Scalene Triangle
Has NO equal sides
Has NO equal angles
Has NO lines of symmetry
Is an irregular shape

13. What type of triangle is this?

14. A Right Angled Triangle

15. A Right Angled Triangle is different
It may be scalene
or it may be isosceles
But it always has a right angle!

16. Properties of a Right Angled Triangle
Has 1 right angle
May be an isosceles triangle
May have 1 line of symmetry
Is an irregular shape
It will be isosceles and have 1 line of symmetry when these 2 sides are equal.

17. Triangles
Shapes with 3 sides!