TRIANGLES

CLASSIFICATIONS, ANGLES AND MORE!!

Different Types of Triangles

Triangles come in different types which can be classified by it’s sides and/or it’s 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

1. ISOSCELES – at least two sides

are equal in length

(Think… Winter Icicles hanging)

2. EQUILATERAL – All sides are

equal in length

(Think…Equal is the same

… Lateral means line)

EQUILATERAL

ISOSCELES

Classifying Triangles by Their Sides

3. SCALENE – none of the sides

are the same

(Think…Scary Scalene)

SCALENE

Classifying Triangles by Their Angles

1) ACUTE – ALL angles are acute2) EQUIANGULAR – ALL angles are equal (Special kind of acute triangle)

3) RIGHT – ONE right angle

4) OBTUSE – ONE obtuse angle

EQUIANGULAR

ACUTE

RIGHT

OBTUSE

Now, Let’s Play a Game!Can you name the

triangle?By it’s Sides? By it’s

Angles?

EquilateralIsoscelesScalene

AcuteRight

ObtuseEquiangular

EquilateralIsoscelesScalene

AcuteRight

ObtuseEquiangular

You are correct!!

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