Classifying Triangles by Their Side Lengths

What are the two ways to classify triangles?

• By the angles and number of sides

• By the angles and side lengths

• By the side lengths and the size of the triangle

• By the angles and the how many points

Tags

CCSS.4.G.A.2

A triangle can be classified as an isosceles triangle if there are two equal sides.

• True

• False

Tags

CCSS.4.G.A.2

What does the term scalene mean?

• all sides equal

• two sides equal

• 90 degree angle

• all sides not equal

Tags

CCSS.4.G.A.2

Identify the triangle by its sides

• Isosceles

• Equilateral

• Scalene

Tags

CCSS.4.G.A.2

Which triangle is an scalene triangle?

• 
• 
• 

Tags

CCSS.2.G.A.1

Which type of triangle is pictured?

• Equilateral

• Isosceles

• Scalene

Tags

CCSS.4.G.A.2

Match the following definitions to the correct vocabulary term.

• A triangle that has no equal sides.

• Equilateral Triangle

• A triangle with only 2 congruent sides.

• Isosceles Triangle

• A triangle that has all congruent sides.

• Scalene Triangle

Tags

CCSS.4.G.A.2

The triangles have been classified by a shared attribute (side length or angle type). Use one of the words acute, right, obtuse, scalene, isosceles, or equilateral to label the headings to identify the way the triangles have been sorted.

c

b

d

Equilateral

Acute

Right

Scalene

Obtuse

Isosceles

Tags

CCSS.4.G.A.2

Which figures belong in the part of the organizer labeled "Isosceles triangles"?

• 
• 
• 
• 
• 

Tags

CCSS.2.G.A.1

Triangles can be classified in 2 ways:

By their angles: acute, right, or obtuse

By their sides: equilateral, isosceles, scalene

Select all the ways the triangle can be classified.

• Acute

• Scalene

• Obtuse

• Equilateral

• Isosceles

Tags

CCSS.4.G.A.2