Types of Triangles and Their Properties

The video introduces triangles, explaining their basic properties and different types, including scalene, isosceles, equilateral, acute, right, and obtuse triangles. It also covers the concepts of exterior and interior angles, providing a comprehensive overview of triangle geometry.

What is the basic definition of a triangle?

• A circle

• A polygon with three sides

• A shape with no sides

• A polygon with four sides

Which of the following is true about scalene triangles?

• Two sides are equal

• No sides are equal

• All sides are equal

• All angles are equal

How many congruent sides does a scalene triangle have?

• Three

• None

• Two

• One

In an isosceles triangle, how many sides are of equal length?

• One

• Two

• Three

• None

In an isosceles triangle, what can be said about the angles opposite the equal sides?

• One is right

• One is obtuse

• They are different

• They are equal

What is a characteristic of equilateral triangles?

• All sides are equal

• All sides are different

• Two sides are equal

• One side is longer

What is true about the angles in an equiangular triangle?

• One angle is obtuse

• All angles are different

• Two angles are equal

• All angles are equal

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

• 45 degrees

• 30 degrees

• 90 degrees

• 60 degrees

What type of angles are found in an acute triangle?

• Straight angles

• Acute angles

• Obtuse angles

• Right angles

Which type of triangle has all angles less than 90 degrees?

• Obtuse triangle

• Acute triangle

• Scalene triangle

• Right triangle