Solving exercises on page 106 of Math 3 Workbook Volume 1, Cánh Diều

Solving Math 3 Workbook Page 106, Cánh Diều Volume 1
 

Solving exercises on page 106 of Math 3 Workbook Volume 1, Cánh Diều:

Perimeter of triangles. Perimeter of quadrilaterals

1. Solve Exercise 1 Page 106 Math Textbook Grade 3

Problem: Calculate the perimeter of the following triangles, quadrilaterals:

Solution: To find the perimeter of the triangles, quadrilaterals, we sum the lengths of all their sides.

Answers:
a) Perimeter of triangle ABC is 3 + 4 + 2 = 9 (cm).
b) Perimeter of quadrilateral DEGH is 3 + 3 + 3 + 3 = 12 (cm).
c) Perimeter of quadrilateral MNPQ is 35 + 30 + 25 + 13 = 103 (mm).

2. Solve Exercise 2 Page 106 Math Textbook Grade 3

Problem: Practice: Measure the length of each side then calculate the perimeter of the following triangles, quadrilaterals:

Solution:
- Use a ruler to measure the lengths of the sides of the triangles, quadrilaterals.
- To find the perimeter of the triangles, quadrilaterals, we sum the lengths of all their sides.

Answers:
+) Triangle ABC:
AB = 3 cm
AC = 4 cm
BC = 5 cm
Perimeter of triangle ABC is: 3 + 4 + 5 = 12 (cm).
+) Quadrilateral MNPQ:
MN = 22 mm
NP = 33 mm
PQ = 11 mm
QM = 33 mm
Perimeter of quadrilateral MNPQ is: 22 + 33 + 11 + 22 = 88 (mm).

3. Solve Exercise 3 Page 106 Math Textbook Grade 3

Problem: Uncle Six uses a grid to fence two garden plots for planting flowers and vegetables as shown below. According to you, how many meters of fence does Uncle Six need to fence the flower garden, and how many meters of fence does he need for the vegetable garden?

Solution:
- The number of meters of fence needed is equal to the perimeter of the garden plot.
- To find the perimeter of triangles, quadrilaterals, we sum the lengths of all their sides.

Answers:
The number of meters of fence needed to fence the flower garden is
                 4 + 5 + 6 = 15 meters
The number of meters of fence needed to fence the vegetable garden is
                 5 + 6 + 4 + 3 = 18 meters
                     Answer: 15 meters
                                  18 meters

We hope that with the detailed solution to exercises on page 106 Math Textbook Grade 3, Cánh Diều book provided above, third-grade students can correctly solve exercises 1, 2, 3. Students can review the theory and practice more similar exercises to strengthen their understanding.