TRIANGLES
CLASSIFICATIONS, ANGLES AND
MORE!!
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Different Types of Triangles
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There are several different types of triangles.
You can classify a triangle by its sides and its
angles.
There are THREE different classifications for
triangles based on their sides.
There are FOUR different classifications for
triangles based on their angles.
Classifying Triangles by Their Sides
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EQUILATERAL – 3 congruent sides
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ISOSCELES – at least two sides
congruent
EQUILATERAL
ISOSCELES
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SCALENE – no sides congruent
SCALENE
Classifying Triangles by Their
Angles
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EQUIANGULAR – all angles are congruent
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ACUTE – all angles are acute
EQUIANGULAR
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RIGHT – one right angle
ACUTE
RIGHT
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OBTUSE – one obtuse angle
OBTUSE
Can You Classify the Different
Triangles in the Picture Below?
Classify the following triangles: AED, ABC, ACD, ACE
The Classifications…
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Triangle AED = Equilateral, Equiangular
Triangle ABC = Equilateral, Equiangular
Triangle ACD = Isoceles, Obtuse
Triangle ACE = Scalene, Right
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So how did you do?
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