Types of Triangles

This video tutorial covers the different types of triangles: right angled, equilateral, isosceles, and scalene. It explains their properties, such as angles, sides, and lines of symmetry. Right angled triangles have a 90° angle and a hypotenuse. Equilateral triangles have three equal sides and angles, each measuring 60°. Isosceles triangles have two equal sides and angles, with one line of symmetry. Scalene triangles have no equal sides or angles and lack symmetry. The video concludes with practice questions.

Which type of triangle has a 90° angle?

• Right-angled

• Isosceles

• Scalene

• Equilateral

How many lines of symmetry does an equilateral triangle have?

• None

• Three

• Two

• One

What is the measure of each angle in an equilateral triangle?

• 45°

• 60°

• 90°

• 120°

Which triangle has two equal sides and two equal angles?

• Equilateral

• Scalene

• Isosceles

• Right-angled

What is a characteristic of a scalene triangle?

• Has a right angle

• All sides are equal

• Two sides are equal

• No sides are equal