Finding the length of a side of a equilateral triangle given the perimeter - Online Tutor

The video tutorial explains the properties of equilateral triangles, focusing on how each side and angle are equal. It introduces the concept of perimeter as the total distance around a figure and demonstrates how to calculate the side length of an equilateral triangle when given the perimeter. The tutorial uses algebraic methods, assigning a variable to unknown side lengths and solving the equation to find the value of one side. The process is verified by checking the sum of the sides equals the given perimeter.

What do the tick marks on the sides of an equilateral triangle represent?

• The sides are equal

• The sides are parallel

• The sides are different

• The sides are perpendicular

What is the perimeter of a shape?

• The total distance around the shape

• The area inside the shape

• The length of one side

• The volume of the shape

If the perimeter of an equilateral triangle is 33, what is the length of one side?

• 12

• 11

• 10

• 13

In algebra, what is commonly used to represent an unknown value?

• A number

• A symbol

• A letter

• A shape

How can you verify the solution to the side length of an equilateral triangle?

• By calculating the area

• By checking if the sum of the sides equals the perimeter

• By measuring each side

• By comparing with another triangle