TRIANGLESTRIANGLES

CLASSIFICATIONS, ANGLES CLASSIFICATIONS, ANGLES AND MORE!!AND MORE!!

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Different Types of Different Types of TrianglesTriangles

There are several different types of There are several different types of triangles. triangles.

You can classify a triangle by its sides You can classify a triangle by its sides and its angles.and its angles.

There are THREE different There are THREE different classifications for triangles based on classifications for triangles based on their sides.their sides.

There are FOUR different classifications There are FOUR different classifications for triangles based on their angles.for triangles based on their angles.

Classifying Triangles by Classifying Triangles by Their SidesTheir Sides

EQUILATERAL – 3 congruent sidesEQUILATERAL – 3 congruent sides

ISOSCELES – at least two sides ISOSCELES – at least two sides

congruentcongruent

SCALENE – no sides congruentSCALENE – no sides congruent

EQUILATERAL

ISOSCELES

SCALENE

Classifying Triangles by Classifying Triangles by Their AnglesTheir Angles

EQUIANGULAR – all angles are EQUIANGULAR – all angles are congruentcongruent

ACUTE – all angles are acuteACUTE – all angles are acute

RIGHT – one right angleRIGHT – one right angle

OBTUSE – one obtuse angleOBTUSE – one obtuse angle

EQUIANGULAR

ACUTE

RIGHT

OBTUSE

Can You Classify the Can You Classify the Different Triangles in the Different Triangles in the

Picture Below?Picture Below?

Classify the following triangles: AED, ABC, Classify the following triangles: AED, ABC, ACD, ACEACD, ACE

The Classifications…The Classifications…

Triangle AED = Equilateral, Triangle AED = Equilateral, EquiangularEquiangular

Triangle ABC = Equilateral, Triangle ABC = Equilateral, EquiangularEquiangular

Triangle ACD = Isoceles, ObtuseTriangle ACD = Isoceles, Obtuse Triangle ACE = Scalene, RightTriangle ACE = Scalene, Right

So how did you do?So how did you do?