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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 Right-Angled.

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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°

Data


Isosceles Triangle

2 sides of equal length

3 vertices

2 equal angles

 

Data


Scalene Triangle

No equal sides

No equal angles

Data


Right-Angled Triangle

One angle is a Right Angle (90°)

Data


Acute-Angled Triangle

3 Acute angles

Data


Obtuse-Angled Triangle

1 Obtuse angle

Data

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Remember

All the angles of a triangle add up to 180°
















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