Classify Triangles by Side and Angle

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

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

• True

• False

What are the three ways to classify triangles by their sides?

• equilateral, right, isosceles

• scalene, obtuse, right

• equilateral, isosceles, scalene

• acute, right, isosceles

What does the term scalene mean?

• all sides equal

• two sides equal

• 90 degree angle

• all sides not equal

Classify the triangle by its angles and its sides.

The name based on the sides is ​ (a)   .

The name based on the angles is ​ (b)   .

• Scalene

• Right

• Acute

• Equilateral

• Obtuse

• Isosceles

CLASSIFY THE TRIANGLE

It's sides make it a ​​ ​ (a)     ​ triangle.

It's angles make it a ​​​ (b)     triangle.

• scalene

• right

• equilateral

• acute

• isosceles

• obtuse

Side Classification: ​ (a)  

Angle Classification: ​ (b)  

• Isosceles

• Acute

• Right

• Obtuse

• Equilateral

• Scalene

Identify this triangle.

• Isosceles Triangle

• Scalene triangle

• obtuse triangle

• Equilateral triangle

Side Classification: ​ (a)  

Angle Classification: ​ (b)  

• Isosceles

• Acute

• Right

• Obtuse

• Equilateral

• Scalene

Identify the type of triangle.

• Isosceles Right

• Scalene Acute

• Equiangular

• Equilateral

• Right Scalene