KS2 Primary Maths Age 13-17 - Measure: Perimeters and Areas - Explained

The video tutorial explains how to calculate the length of a rectangle using identical right-angled triangles. It begins by introducing the concept of identical triangles and the given measurements. The tutorial then demonstrates how to find the base and height of these triangles, using the information that one side of the rectangle is 7 centimeters. By calculating the base as 3.5 centimeters and the height as 7 centimeters, the total length of the rectangle is determined to be 10.5 centimeters. The tutorial emphasizes the importance of understanding the problem setup and using given measurements effectively.

What is the key concept introduced in the first section regarding the triangles?

• The triangles are equilateral.

• The triangles are all different.

• The triangles are identical and right-angled.

• The triangles are isosceles.

What is the given measurement for the side of the rectangle?

• 3.5 centimeters

• 10 centimeters

• 7 centimeters

• 5 centimeters

How is the base of one triangle calculated?

• By subtracting 2 from the given side length

• By halving the given side length

• By adding 2 to the given side length

• By doubling the given side length

What is the total length of the rectangle?

• 12 centimeters

• 10.5 centimeters

• 14 centimeters

• 9 centimeters

What is the significance of the number 7 in the final calculation?

• It is the height of the rectangle.

• It is used to calculate the total length.

• It is the width of the rectangle.

• It is the length of the rectangle.