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Solving Grade 3 Math exercises on pages 24 and 25, Cánh Diều workbook volume 2
Solving exercises on pages 24 and 25 of Math 3 Textbook Volume 2, Cánh Diều:
Circles, center, diameter, radius
1. Solve Exercise 1 Page 24 Math Textbook Grade 3
a) Name the circle and its radii for each of the following shapes (as shown):
b) Name the circle and its diameters for each of the following shapes (as shown):
Solution Guide: Observe the drawings and then determine the center and radius of each circle.
Answers:
a)
b)
2. Solve Exercise 2 Page 25 Math Textbook Grade 3
Problem: a) Given a circle with center O and a diameter of 8 cm. Find the radius of the circle.
b) Given a circle with center O and a radius of 5 cm. Find the diameter of the circle.
Guidelines for solving: Diameter is twice the length of the radius.
Answers:
a) The radius of the circle is:
8 ÷ 2 = 4 (cm)
b) The diameter of the circle is:
5 x 2 = 10 (cm)
Answer: a) 4 cm
b) 10 cm
- See more: Solving exercises on page 29 Math 3 Textbook Volume 2, Cánh Diều
3. Solve Exercise 4 Page 25 Math Textbook Grade 3
Problem: According to you, what is the diameter of each wheel in the picture below in xang-ti-met?
Solution Guide:
Step 1: Count to see the length of the diameter of each wheel equals the length of how many squares.
Step 2: Length of each wheel = Length of one square x Number of squares counted.
Answers:
We observe that the diameter of the front wheel equals the length of 10 squares. The diameter of the rear wheel equals the length of 8 squares.
Each square has a side length of 5 cm.
The diameter of the front wheel is:
10 x 5 = 50 (cm).
The diameter of the rear wheel is:
8 x 5 = 40 (cm)
Answer: Rear wheel: 50 cm
Front wheel: 40 cm
Through the solution document for exercises on pages 24 and 25 of Math 3 Textbook Volume 2, Cánh Diều, hopefully, students have been able to do exercises related to Circles, center, diameter, radius.
