Classify Triangles by Sides and Angles

Select the correct words to define the triangle shown in the picture.

The picture shows a(n) ​ (a)   ​ (b)   triangle.

• obtuse

• scalene

• acute

• right

• isosceles

• equilateral

Side Classification: ​ (a)  

Angle Classification: ​ (b)  

• Isosceles

• Acute

• Right

• Obtuse

• Equilateral

• Scalene

Identify the triangle by its sides and angles

• Equilateral

• Obtuse Equilateral

• Acute Equilateral

• Acute Isosceles

The triangle in the image is ​ (a)   based on its side lengths and ​ (b)   based on its angles.

• isosceles

• obtuse

• scalene

• equilateral

• acute

• right

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)   .

• Isosceles

• Obtuse

• Right

• Acute

• Equilateral

• Scalene

Classify this triangle by its sides and angles.

• acute

• obtuse

• isosceles

• equilateral

Classify this triangle by its sides and angles.

A triangle has angle measurements of 20°, 140°, and 20°

• acute

• obtuse

• isosceles

• equilateral

Classify this triangle by sides:

• Equilateral

• Isosceles

• Scalene

• Acute

Classify this triangle by angles:

• Acute

• Obtuse

• Right

• Scalene

What types of triangles describe the kind of sides a triangle has? Pick all that apply.

• Equilateral

• Scalene

• Obtuse

• Isosceles