Solve Exercise 4 on pages 43 and 44 of the 4th-grade math textbook.

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Ngày cập nhật gần nhất: 15/4/2026

Solve Exercise 4 on pages 43 and 44 of the 4th-grade math textbook - Expressions with three characters. Write the formula for calculating the perimeter (P) of that triangle.

Guidance for solving Exercise 4 on pages 43 and 44 of the 4th-grade math textbook.

Solution method:
- Triangle perimeter formula: P = a + b + c
- Substitute the values of a, b, c into the formula, calculate mentally to find the result quickly and accurately.

Triangle Perimeter:
a) Formula for the perimeter of a triangle: P = a + b + c
b) Substitute the side lengths of the triangle to find its perimeter:
For a = 5 cm, b = 4 cm, and c = 3 cm, P = 12 cm
For a = 10 cm, b = 10 cm, and c = 5 cm, P = 25 cm
For a = 6 dm, b = 6 dm, and c = 6 dm, P = 18 dm

Mytour has just provided guidance on solving Exercise 4 on pages 43 and 44 of the 4th-grade math textbook. Additionally, we also suggest solutions for Exercise 1 on pages 43 and 44 of the 4th-grade math textbook, Exercise 2 on pages 43 and 44 of the 4th-grade math textbook, Exercise 3 on pages 43 and 44 of the 4th-grade math textbook. Check out the guide to solving exercises on pages 43 and 44 of 4th-grade math to excel in math class!

Frequently Asked Questions

What is the formula for calculating the perimeter of a triangle?

The formula for calculating the perimeter (P) of a triangle is P = a + b + c, where a, b, and c represent the lengths of the three sides of the triangle.

How do you substitute values to find the triangle's perimeter?

To find the perimeter, substitute the lengths of the sides into the formula P = a + b + c. For example, if a = 5 cm, b = 4 cm, and c = 3 cm, then P = 12 cm.

Can you provide an example of calculating a triangle's perimeter?

Yes, for a triangle with side lengths a = 10 cm, b = 10 cm, and c = 5 cm, substituting these values into the formula gives P = 10 + 10 + 5, resulting in a perimeter of 25 cm.

What guidance is available for solving exercises in the 4th-grade math textbook?

Mytour offers comprehensive guidance on solving exercises 1 to 4 on pages 43 and 44 of the 4th-grade math textbook, helping students excel in their math classes.

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