Types and Classifications of Triangles

The video tutorial explains how to classify triangles based on their sides and angles. It covers three types of triangles by sides: scalene (no equal sides), isosceles (two equal sides), and equilateral (all sides equal). It also discusses classification by angles: acute (all angles less than 90 degrees), right (one 90-degree angle), and obtuse (one angle greater than 90 degrees). An example is provided where a triangle with sides of different lengths is identified as a scalene triangle, and its angles are all less than 90 degrees, making it an acute triangle.

What is a triangle called if none of its sides are of equal length?

• Scalene

• Equilateral

• Right

• Isosceles

Tags

CCSS.4.G.A.2

Which type of triangle has two sides of equal length?

• Equilateral

• Obtuse

• Isosceles

• Scalene

Tags

CCSS.4.G.A.2

What is the term for a triangle with two equal angles?

• Scalene

• Isosceles

• Right

• Equilateral

Tags

CCSS.4.G.A.2

What is the name of a triangle with all sides of the same length?

• Scalene

• Isosceles

• Equilateral

• Acute

Tags

CCSS.4.G.A.2

Which of the following is not a classification based on triangle sides?

• Equilateral

• Scalene

• Isosceles

• Right

Tags

CCSS.4.G.A.2

What is the name of a triangle with all angles equal?

• Scalene

• Right

• Isosceles

• Equilateral

Tags

CCSS.4.G.A.2

If a triangle has one angle measuring exactly 90 degrees, what is it called?

• Acute

• Equilateral

• Right

• Obtuse

Tags

CCSS.4.G.A.2

Which type of triangle has all angles less than 90 degrees?

• Acute

• Scalene

• Obtuse

• Right

Tags

CCSS.4.G.A.2

What is the classification of a triangle with one angle greater than 90 degrees?

• Acute

• Right

• Obtuse

• Equilateral

Tags

CCSS.4.G.A.2

Which triangle type can only have one 90-degree angle?

• Obtuse

• Right

• Acute

• Equilateral

Tags

CCSS.4.G.A.2