Introduction to Classifying Triangles

Identify the triangle by its sides and angles

• Equilateral

• Obtuse Equilateral

• Acute Equilateral

• Acute Isosceles

Identify the triangle by its sides and angles

• Right Isosceles

• Right Scalene

• Obtuse Isosceles

• Obtuse Scalene

Identify the triangle by its sides and angles

• Obtuse Isosceles

• Obtuse Equilateral

• Obtuse Scalene

Identify the triangle by its sides and angles

• Acute Equilateral

• Right Equilateral

• Acute Isosceles

• Obtuse Isosceles

Identify the triangle by its sides and angles

• Obtuse

• Acute Isosceles

• Obtuse Scalene

• Obtuse Isosceles

Identify this triangle by its sides

• Right

• Scalene

• Isosceles

• Equilateral

An isosceles triangle has how many congruent sides?

• 1

• 2

• 3

A right triangle can not be equilateral

• True

• False

How many acute angles must an acute triangle have?

• 2

• 1

• 4

• 3

A triangle has angle measurements of 163°, 2°, and 15°. What kind of triangle is it?

• acute triangle

• right triangle

• obtuse triangle

• none of the above