Download Types of Triangles

Triangles
Shapes with 3 sides!
Equilateral Triangle
All 3 Sides are equal in Length
All 3 interior angles are the same
Isosceles Triangle
Two Sides of equal Length
Two interior angles are the same
Scalene Triangle
No Sides of equal Length
All interior angles are different
Right-Angled Triangles
Right-Angled Triangles can be either Isosceles or scalene
triangles
They have an Interior angle of
Scalene Right Angled Triangle
90 degrees
Isosceles Right Angled Triangle
What type of triangle is this?
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An Equilateral Triangle
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How many lines of symmetry
has an Equilateral Triangle got?
1
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2
3
Properties of an Equilateral Triangle
 Has 3 equal sides
 Has 3 equal angles
o
 Each angle is a 60 angle
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 Has 3 lines of symmetry
 Is a regular shape
What type of triangle is this?
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An Isosceles Triangle
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How many lines of symmetry
has an Isosceles Triangle got?
1
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Properties of an Isosceles Triangle
 Has 2 equal sides
 Has 2 equal angles
Has 1 line of symmetry
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 Is an irregular shape
What type of triangle is this?
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A Scalene Triangle
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How many lines of symmetry
has a Scalene Triangle got?
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None!
Properties of an Scalene Triangle
 Has NO equal sides
 Has NO equal angles
Has NO lines of symmetry
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 Is an irregular shape
What type of triangle is this?
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A Right Angled Triangle
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A Right Angled Triangle is different
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It may be scalene
or it may be isosceles
But it always has a right angle!
Properties of a Right Angled Triangle
 Has 1 right angle
 May be an isosceles triangle
May have 1 line of symmetry
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 Is an irregular shape
It will be isosceles and have 1 line of
symmetry when these 2 sides are equal.