Types and Properties of Triangles

The video tutorial explains how to classify triangles based on their sides and angles. It covers three types of triangles by sides: equilateral, isosceles, and scalene, and three types by angles: acute, obtuse, and right. The tutorial emphasizes that each triangle can be classified in two ways, providing a comprehensive understanding of triangle classification. Students are encouraged to practice by classifying given triangles based on these criteria.

How many types of triangles are discussed in the video?

• Four

• Five

• Six

• Seven

What are the two main ways to classify triangles?

• By perimeter and area

• By color and size

• By sides and angles

• By height and base

What is a characteristic of an equilateral triangle?

• Two sides are equal

• One side is longer

• All sides are equal

• All sides are different

Which triangle has two equal sides?

• Scalene

• Equilateral

• Isosceles

• Right

What does the term 'congruent' mean in the context of triangles?

• Different

• Equal

• Perpendicular

• Parallel

Which triangle has no equal sides?

• Equilateral

• Isosceles

• Scalene

• Right

What is the purpose of the hash marks on triangle sides?

• To indicate color

• To decorate

• To show equal sides

• To measure angles

What is the key feature of a scalene triangle?

• One side is equal

• No sides are equal

• Two sides are equal

• All sides are equal

What is a defining feature of an acute triangle?

• One angle is 90 degrees

• All angles are less than 90 degrees

• All angles are greater than 90 degrees

• All angles are 90 degrees

How many acute angles does an acute triangle have?

• None

• Three

• Two

• One