Classifying Triangles

What kind of triangle is this?

• acute

• right

• obtuse

• 360 degrees

If a triangle has all angles less than 90° and two equal sides, what type of triangle is it?

• Acute Isosceles

• Acute Scalene

• Obtuse Scalene

• Obtuse Isosceles

Look at the sides and angles of this triangle. Which type of triangle is pictured?

• Equilateral Triangle

• Right Isosceles Triangle

• Obtuse Scalene Triangle

• Obtuse Equilateral Triangle

Label the three triangles

a

b

c

Equilateral Triangle

Scalene Triangle

Isosceles Triangle

Side Classification: ​ (a)  

Angle Classification: ​ (b)  

• Isosceles

• Acute

• Right

• Obtuse

• Equilateral

• Scalene

Classify this triangle.

b

acute isosceles

obtuse scalene

right isosceles

acute equilateral

right scalene

Classify the following triangle​ .​ ​ ​ ​ ​ ​ ​ ​ ​ ​​ ​ (a)   ​ (b)   ​ (c)   ​

• right triangle

• acute triangle

• obtuse triangle

Classify this triangle.

e

acute scalene

acute equilateral

acute isosceles

right isosceles

right scalene

Which triangle is classified as scalene and obtuse?

Side Classification: ​ (a)   Angle Classification: ​ (b)  

• isosceles

• right

• scalene

• obtuse

• equilateral

• acute