Buzz
Perimeter of a Square
Practice
1. Solve Exercise 1 on Page 40 Math Workbook Grade 3
Problem: Calculate the perimeter of a square.
To find the perimeter of a square, multiply the length of one side by 4.
The answer is:
Check out Exercise 2 on page 40 of Math Grade 3 Textbook.
Problem: Calculate the length of the side of a square.
Solution: Length of the side of a square = perimeter of the square ÷ 4.
The answer is:
Happy learning!
Problem: Hiếu uses a string to connect stars to decorate a square frame (see image). The side of the frame is 50 cm long. How long is the string in meters?
Solution: The length of the string equals the perimeter of the square frame. To calculate the perimeter of a square, multiply the length of one side by 4.
Answer: The length of the string is x meters:
50 x 4 = 200 (cm)
Convert: 200 cm = 2 m.
Thus, the length of the string is 2 m.
Answer: 2 m.
2. Solve Exercise 2 on Page 41 of Mathematics Textbook Grade 3
Problem: Choose the correct answer.
Each photo of your groupmates in the team is a square with a side of 8 cm. What is the perimeter of the large square formed by 9 such photos?
A. 32 cm
B. 96 cm
C. 288 cm
Solution: + The side of the large square = the side of each photo x 3.
+ The perimeter of the large square = side of the large square x 4.
Answer: The side of the large square is:
8 x 3 = 24 (cm)
The perimeter of the large square is:
24 x 4 = 96 (cm)
Answer: 96 cm.
We choose answer B.
