How to find out Area and Perimeter of a shape #maths

Summary

In this engaging class, the instructor explains how to calculate the perimeter and area of a given shape, specifically a rectangle. The lesson covers the difference between perimeter (the sum of the lengths of all sides) and area (the total space the shape occupies). The instructor demonstrates the process using a rectangle with side lengths of 6 cm and 8 cm, showing how to add the sides to find the perimeter and multiply the length by the width to find the area. The session emphasizes the importance of these calculations and encourages students to practice with other shapes.

Takeaways

• 😀 Understanding the difference between perimeter and area is crucial: Perimeter refers to the boundary of a shape, while area refers to the space inside it.
• 😀 To calculate the **perimeter** of a rectangle, add up the lengths of all four sides, using the formula: P = 2 × (Length + Width).
• 😀 The **area** of a rectangle is found by multiplying its length and width, using the formula: A = Length × Width.
• 😀 In the example given, the perimeter of a rectangle with length 1 cm and width 8 cm is 18 cm.
• 😀 The area of a rectangle with length 1 cm and width 8 cm is 8 cm².
• 😀 The script emphasizes the importance of understanding the formulae for perimeter and area, as they apply to all rectangles.
• 😀 When calculating **perimeter**, always remember to add the length and width twice (because a rectangle has two sides of each dimension).
• 😀 For **area**, remember that you're finding the space inside the shape, and multiplication is the operation used.
• 😀 The teacher uses a clear and engaging method, demonstrating with practical examples to ensure understanding of key concepts.
• 😀 The script encourages students to practice the steps on their own using provided dimensions, reinforcing the learning process.
• 😀 Students are reminded that perimeter and area are related to the shape's boundaries and interior, respectively, and should be calculated using the correct formulae.

Q & A

What is the main objective of today's lesson?

The main objective of today's lesson is to teach students how to find the area and perimeter of a given shape, specifically a rectangle.

How do we calculate the perimeter of a rectangle?

The perimeter of a rectangle is calculated by adding the lengths of all four sides. For a rectangle, the formula is: P = 2 × (Length + Width).

In the example, what are the dimensions of the rectangle?

In the example, the length of the rectangle is 1 cm and the width is 8 cm.

What is the formula for finding the perimeter of a rectangle?

The formula for the perimeter of a rectangle is P = 2 × (Length + Width), where Length and Width are the dimensions of the rectangle.

How do we find the area of a rectangle?

The area of a rectangle is found by multiplying the length by the width. The formula is: Area = Length × Width.

What is the area of the given rectangle in the example?

The area of the given rectangle in the example is 1 cm × 8 cm = 8 cm².

What is the difference between perimeter and area?

The perimeter is the total length of the boundary of the shape, while the area is the amount of space the shape covers. The perimeter is calculated by adding the lengths of all sides, and the area is calculated by multiplying the length and width.

Why do we multiply the length and width to find the area?

We multiply the length and width to find the area because we are determining how much space the rectangle occupies. Multiplying these two measurements gives us the total area.

What steps should we follow to calculate the perimeter of a rectangle?

To calculate the perimeter, first identify the length and width of the rectangle, then add them together and multiply by 2 (P = 2 × (Length + Width)).

How can we apply the concepts of area and perimeter in real-life situations?

The concepts of area and perimeter are used in various real-life situations, such as determining the amount of material needed for a fence (perimeter) or calculating the amount of paint needed to cover a surface (area).