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Solving 4th-grade math page 57, 58 in VBT book 2, Diamond area, exercise 134 is a document that provides detailed solutions and explanations for exercises 1, 2, 3, closely aligned with the learning content. This guide helps students and parents with easy reference, visualizing the problem-solving process to guide the child effectively.
Solving 4th-grade math page 57, 58 in VBT book 2, Diamond area, exercise 134
1. Solve exercise 1 - Math workbook grade 4 book 2 page 57
Problem Statement:
Mark (x) in the blank spaces below the diamond shape with an area less than 20cm2.
Solution Method:
- Calculate the areas of the diamond shapes and compare the results with 20cm2.
The area of a diamond is calculated by multiplying the lengths of its two diagonals and dividing by 2 (in the same unit of measurement).
S = (m x n) : 2
(S represents the area of the diamond, m, and n are the lengths of the two diagonals).
Answer
The area of diamond ABCD is:
(9 x 6) : 2 = 27 (cm2)
The area of diamond MNPQ is:
(5 x 8) : 2 = 40 (cm2)
The area of diamond EGHK is:
(6 x 5) : 2 = 15 (cm2)
Therefore, the diamond with an area less than 20cm2 is EGHK.
2. Solve exercise 2 - Math workbook grade 4 book 2 page 57
Problem Statement:
Fill in the blanks:
Solution Method:
Apply the rule: The area of a diamond is the product of the lengths of its two diagonals divided by 2 (in the same measuring unit).
Answer:
3. Solve exercise 3 - Math workbook grade 4 book 2 page 58
Problem Statement:
A diamond-shaped piece of cardboard has diagonal lengths of 10cm and 24cm. Calculate the area of that piece of cardboard:
Solution Method:
To find the area of the cardboard piece, multiply the lengths of its two diagonals and divide by 2 (in the same measuring unit).
Answer:
The area of the cardboard piece is:
(10 x 24) : 2 = 120 (cm2)
Answer: 120cm2
You are currently viewing the guide to solve 4th-grade math page 57, 58 in VBT book 2, Diamond area, exercise 134. You can review the guide to solve 4th-grade math page 56, 57 VBT book 2 Diamond or preview the guide to solve 4th-grade math page 58, 59 VBT book 2 Practice to understand more about the lesson.
Wishing you all success in your math studies.
