The video tutorial explains the properties of different types of triangles: scalene, isosceles, and equilateral. A scalene triangle has three sides of different lengths and three different angles. An isosceles triangle has two equal sides and at least two equal angles. An equilateral triangle has three equal sides, and each angle measures 60 degrees.

What is a key characteristic of a scalene triangle?

• All sides are equal

• Two sides are equal

• All sides are different

• It has a right angle

Which triangle has all sides of different lengths?

• Scalene

• Right

• Equilateral

• Isosceles

How many equal angles does an isosceles triangle have?

• At least one

• None

• At least two

• All three

Which of the following is true about an equilateral triangle?

• It has no equal sides

• It has one angle of 90 degrees

• It has two equal sides

• All angles are 60 degrees

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

• 60 degrees

• 45 degrees

• 90 degrees

• 120 degrees