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Slide 1

TRIANGLES

CLASSIFICATIONS, ANGLES AND MORE!!

Slide 2

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.

Slide 3

EQUILATERAL – 3 congruent sides

ISOSCELES – at least two sides

congruent

SCALENE – no sides congruent

EQUILATERAL

ISOSCELES

SCALENE

Slide 4

EQUIANGULAR – all angles are congruent

ACUTE – all angles are acute

RIGHT – one right angle

OBTUSE – one obtuse angle

EQUIANGULAR

ACUTE

RIGHT

OBTUSE

Slide 5

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

Slide 6

Triangle AED = Equilateral, Equiangular

Triangle ABC = Equilateral, Equiangular

Triangle ACD = Isoceles, Obtuse

Triangle ACE = Scalene, Right

So how did you do?

- Different Types of Triangles
- Classifying Triangles by Their Sides
- Classifying Triangles by Their Angles
- Can You Classify the Different Triangles in the Picture Below?
- The Classifications…

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