The video tutorial explains how to find the length of an interval using Pythagoras' Theorem. It begins with identifying the need for a right triangle, constructing it using coordinate axes, and calculating the vertical and horizontal lengths. The tutorial then applies Pythagoras' Theorem to find the hypotenuse, approximates the distance, and finally derives a general formula for calculating distances between points.

What is the initial problem the teacher wants to solve?

• Finding the area of a triangle

• Determining the angle of a triangle

• Calculating the length of interval AB

• Measuring the perimeter of a shape

Why is Pythagoras' Theorem initially considered unsuitable?

• It is only applicable to equilateral triangles

• It requires a right-angled triangle

• It only works for isosceles triangles

• It needs three known sides

What is the significance of the coordinate axes in constructing the triangle?

• They provide a reference for angles

• They help in determining the lengths of the sides

• They are used to calculate the area

• They are irrelevant to the problem

How is the vertical length of the triangle determined?

• By dividing the y-coordinates

• By adding the coordinates

• By multiplying the coordinates

• By subtracting the y-coordinates

What is the calculated length of the hypotenuse before approximation?

• 30

• 25

• 20

• 16

What is the approximate length of the hypotenuse?

• 4.47

• 5.00

• 6.32

• 3.16

What is the purpose of the distance formula?

• To measure the angle between two lines

• To determine the distance between two points

• To calculate the perimeter of a shape

• To find the area of a triangle

Why does the distance formula include a square root?

• To simplify the equation

• To add an extra step in calculation

• To reverse the squaring in Pythagoras' Theorem

• To make the formula more complex

What does the subtraction in the distance formula represent?

• The difference in coordinates

• The sum of the coordinates

• The product of the coordinates

• The division of the coordinates

What is the main advantage of using the distance formula?

• It simplifies the process of finding distances

• It eliminates the need for a calculator

• It is only applicable to right-angled triangles

• It provides exact measurements