Calculate the Perimeter of a Square with Side Length 8 Units

Q: What's the difference between perimeter and area?

Perimeter measures the distance around the outside of a shape (like fencing around a yard). Area measures the space inside the shape (like carpet covering a floor).

Q: Why do I multiply by 4 instead of adding 8 four times?

Both methods work! $ 8 \times 4 = 32 $ is faster than $ 8 + 8 + 8 + 8 = 32 $, but they give the same answer. Use whichever feels easier!

Q: Do all squares have the same perimeter formula?

Yes! Every square uses Perimeter = 4 × side length because all squares have 4 equal sides. Only the side length changes between different squares.

Q: What if I forgot the perimeter formula?

No worries! Just remember that perimeter means going around the edge. Add up all the sides: top + right + bottom + left. Since they're all 8, you get 8 + 8 + 8 + 8 = 32.

Q: Can perimeter be measured in different units?

Absolutely! Perimeter can be in centimeters, inches, feet, meters - any length unit. Just make sure all sides use the same unit when calculating.

Square Perimeter with Equal Sides

What is its perimeter of the square?

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations

00:05 Let's calculate the perimeter of a square.

00:09 In a square, all sides are equal in length.

00:13 So, the perimeter is one side length, times four.

00:17 And that's how we find the perimeter of a square!

Step-by-step written solution

Follow each step carefully to understand the complete solution

Understand the problem

What is its perimeter of the square?

Step-by-step solution

Since in a square all sides are equal to each other, all sides are equal to 8 cm.

Now we can calculate the perimeter:

$8\times4=32$

Final Answer

Key Points to Remember

Essential concepts to master this topic

Definition: Perimeter equals the sum of all four sides
Formula: Multiply side length by 4: $8 \times 4 = 32$
Check: Count each side once: 8 + 8 + 8 + 8 = 32 units ✓

Common Mistakes

Avoid these frequent errors

Calculating area instead of perimeter
Don't multiply side × side (8 × 8 = 64) = area formula! This gives you square units of space inside, not the distance around. Always multiply side × 4 for perimeter.

Practice Quiz

Test your knowledge with interactive questions

Look at the rectangle ABCD below.

Side AB is 6 cm long and side BC is 4 cm long.

What is the area of the rectangle?

FAQ

Everything you need to know about this question

What's the difference between perimeter and area?

Perimeter measures the distance around the outside of a shape (like fencing around a yard). Area measures the space inside the shape (like carpet covering a floor).

Why do I multiply by 4 instead of adding 8 four times?

Both methods work! $8 \times 4 = 32$ is faster than $8 + 8 + 8 + 8 = 32$ , but they give the same answer. Use whichever feels easier!

Do all squares have the same perimeter formula?

Yes! Every square uses Perimeter = 4 × side length because all squares have 4 equal sides. Only the side length changes between different squares.

What if I forgot the perimeter formula?

No worries! Just remember that perimeter means going around the edge. Add up all the sides: top + right + bottom + left. Since they're all 8, you get 8 + 8 + 8 + 8 = 32.

Can perimeter be measured in different units?

Absolutely! Perimeter can be in centimeters, inches, feet, meters - any length unit. Just make sure all sides use the same unit when calculating.

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