Classifying Triangles

All triangles have 3 sides and 3 angles.

• TRUE

• FALSE

The 3 angles in a triangles ALWAYS add up:

• 180°

• 360°

• 90°

• 100°

Triangles are classified by:

• sides

• angles

• sides and angles

• a ruler

A triangle with 3 equal sides and 3 equal angles is called:

• Isoceles Triangles

• Equilateral Triangle

• Scalene Triangle

• Obtuse Triangle

A triangle with 2 equal sides and 2 equal angles is called:

• Equal Triangle

• Equilateral Triangle

• Isoceles Triangle

• Scalene Triangle

A scalene triangle has:

• no equal sides

• no equal angles

• 3 equal sides

• 3 equal angles

These nachos are an example of which triangle?

• equilateral

• isoceles

• isoceles and equilateral

• obtuse

These pyramids are examples of a/an:

• isoceles triangle

• equilateral triangle

• scalene triangle

This sailing boat is an example of a scalene triangle.

• TRUE

• FALSE

A triangle with a 90° angle is called:

• right triangle

• acute triangle

• obtuse triangle