2D Shapes  Triangles
Triangles are 2 dimensional shapes which have three sides, three angles and three vertices. The three angles of a triangle always add up to 180°.
There are four types of triangle: Equilateral, Scalene, Isosceles and RightAngled.
_________________________________________________________
Equilateral Triangle 
3 sides of equal length
3 vertices
3 equal angles
The angles of a triangle always add up to 180°, therefore each angle of an equilateral triangle
is, 180 ÷ 3 = 60° 

Isosceles Triangle

2 sides of equal length
3 vertices
2 equal angles


Scalene Triangle

No equal sides
No equal angles


RightAngled Triangle

One angle is a Right Angle (90°)


AcuteAngled Triangle

3 Acute angles


ObtuseAngled Triangle

1 Obtuse angle


_________________________________________________________
Remember
All the angles of a triangle add up to 180°

