Triangle Vocabulary

Match the following triangles with their side classification.

• Equilateral Triangle

• 
• Scalene Triangle

• 
• Isosceles Triangle

• 

Tags

CCSS.4.G.A.2

How many angles does a triangle have?

• 4

• 3

• 2

Tags

CCSS.2.G.A.1

What is an acute angle?

• An angle that measures 90°

• An angle that measures more than 90° and less than 180°

• An angle that measures between 0 and 90°

  Always less than 90°

• An angle that measures more than 180°

Tags

CCSS.4.G.A.1

What is an obtuse angle?

• An angle that measures less than 90°

• An angle that measures exactly 90°

• An angle that measures more than 90° and less than 180°

Tags

CCSS.4.G.A.1

What is a right angle?

• A right angle measures exactly 180°

• A right angle measures exactly 90°

• A right angle is always less than 90°

Tags

CCSS.4.G.A.1

Based on it's angles, what type of triangle is this?

• acute triangle

• obtuse triangle

• right triangle

• equiangular triangle

Tags

CCSS.4.G.A.2

Based on its angles, what type of triangle is this?

• Acute triangle

• Obtuse triangle

• Isosceles triangle

• Right triangle

Tags

CCSS.4.G.A.2

Based on its angles, what type of triangle is this?

• Scalene triangle

• Acute triangle

• Obtuse triangle

• It looks like a roof.

Tags

CCSS.4.G.A.2

Which triangle is an isosceles triangle?

• 
• 
• 

Tags

CCSS.2.G.A.1

Which of these triangles is isosceles?

• 
• 
• 

Tags

CCSS.2.G.A.1