Classifying Triangles by Lengths Acute Right Obtuse

Classify this triangle by its sides and angles.

• acute

• obtuse

• isosceles

• equilateral

Tags

CCSS.4.G.A.2

Correct the error in classifying this triangle

• It is acute and isosceles

• It is obtuse and isosceles

• It is right and scalene

• It is obtuse and scalene

Tags

CCSS.4.G.A.2

A mosaic is pattern or picture made of small pieces of colored material. Classify the yellow triangle used in the mosaic.

• Equilateral Acute Triangle

• Isosceles Acute Triangle

• Scalene Acute Triangle

• Isosceles Obtuse Triangle

Tags

CCSS.4.G.A.2

When classifying a triangle by its angles, what type of triangle has one right angle?

• acute triangle

• right triangle

• obtuse triangle

• none of the above

Tags

CCSS.4.G.A.2

A triangle has angle measurements of 27°, 72°, and 81°. What kind of triangle is it?

• acute triangle

• right triangle

• obtuse triangle

• none of the above

Tags

CCSS.4.G.A.2

• acute triangle
• right triangle
• obtuse triangle
• none of the above

Tags

CCSS.4.G.A.2

What type of triangle has one angle greater than 90 degrees?

• acute triangle

• right triangle

• obtuse triangle

• none of the above

Tags

CCSS.4.G.A.2

• equilateral triangle
• isosceles triangle  
• scalene triangle
• none of the above

Tags

CCSS.4.G.A.2

When classifying a triangle by its angles, what type of triangle has three acute angles? 

• acute triangle

• right triangle

• obtuse triangle

• none of the above

Tags

CCSS.4.G.A.2

When classifying a triangle by its angles, what type of triangle has one obtuse angle?

• acute triangle

• right triangle

• obtuse triangle

• none of the above

Tags

CCSS.4.G.A.2