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In tackling 4th-grade math on pages 57, 58 in the Sky Wings Book 1, Concentrated Practice, students will engage in exercises that hone their ability to observe geometric shapes. Through visual cues, they will identify parallel and perpendicular lines. The article provides step-by-step guidance, assisting students in leveraging angle properties to answer questions.
Explore additional 4th-grade Math resources: - Solve 4th-grade Math in Sky Wings Book 1
Solving 4th-grade Math in Sky Wings Book 1, pages 57, 58
Exercise 23: Concentrated Practice
1. Solve Problem 1 - Kite Grade 4 Book 1, page 57
Problem:
a) Among the given angles, which one is acute, right, obtuse?
b) Use a protractor to measure the magnitude of the angles.
Solution Method:
Observe the illustration and rely on the properties of the angles to answer the questions.
Answer:
a) Angle at vertex O, adjacent to OA and OB, is an acute angle.
Angle at vertex I, adjacent to IK and IH, is an obtuse angle.
Angle at vertex N, adjacent to NM and NP, is a right angle.
b) Use a protractor to measure the magnitude of the angles.
Angle at vertex O, adjacent to OA and OB, measures 60 degrees.
Angle at vertex I, adjacent to IK and IH, measures 120 degrees.
Angle at vertex N, adjacent to NM and NP, measures 90 degrees.
2. Solve Problem 2 - Kite Grade 4 Book 1, page 57
Problem:
Identify pairs of parallel lines and pairs of perpendicular lines in the figure below:
Solution Method:
Two perpendicular lines intersect, forming a 90-degree angle.
Two parallel lines are lines that do not intersect.
Answer:
Figures with pairs of parallel lines: c, e
Figures with pairs of perpendicular lines: b, d
3. Solve Problem 3 - Kite Grade 4 Book 1, page 57
Problem:
Draw a line passing through point A and perpendicular to line BC in each of the following cases:
Solution Method:
2 perpendicular lines are two lines intersecting, forming a 90-degree angle.
Answer:
4. Solve Problem 4 - Kite Grade 4 Book 1, page 58
Problem:
Draw a line passing through point A and parallel to line BC in each of the following cases:
Phương pháp giải:
2 đường thẳng song song là 2 đường thẳng không có điểm chung
Answer:
5. Giải bài 5 - Cánh Diều lớp 4 tập 1 trang 58
Đề bài:
Quan sát hình vẽ:
a) Identify pairs of parallel roads and pairs of perpendicular roads.
b) How should you design the shortest road from point A to the house?
Solution Method:
Observe the image to answer the question.
Answer:
a) Identify roads that are parallel: 3 and 4, 3 and 7, 4 and 7, 5 and 6, 5 and 7, 6 and 7.
Roads perpendicular to each other: 1 and 3, 1 and 4, 1 and 5, 1 and 6, 1 and 7, 2 and 3, 2 and 4, 2 and 5, 2 and 6, 2 and 7.
b) The shortest road from A to the house is highlighted in red in the figure below:
You are currently viewing the guide for solving 4th-grade math on pages 57, 58 Kite Book 1, Concentrated Practice, Exercise 23. You can review the instructions for solving 4th-grade math on pages 54, 55, 56 Kite Book 1 - Exercise 22. Two parallel lines. Draw two parallel lines or preview the guidance for solving 4th-grade math on pages 59, 60 Kite Book 1 - Exercise 24. Review what you have learned to better understand the lesson.
Best wishes for success in your mathematics studies.
