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Guidance for solving Grade 5 Math Problems Pages 91, 92 (including solution methods)
1. Solving problem 1 - Solving Math 5 on pages 91, 92
Exercise statement:
Solution method:
Students need to pay attention to identifying the trapezoid:
- It has two parallel sides
- The other two sides are the non-parallel sides.
Answer:
Figures 1, 2, 4, 5, 6 are trapezoids.
2. Solving problem 2 - Solving Math problem for Grade 5 on page 91, 92
Solution Method:
- Observe the diagram carefully and answer the questions correctly.
- Note:
- Two parallel sides are sides that do not intersect.
- Determining whether the given figure is a right angle or not using a set square:
+ Place one side of the set square on one side of the given angle.
+ If the other perpendicular side of the set square coincides with the remaining side of the given angle, then the angle is a right angle; otherwise, if it does not coincide, then the angle is not a right angle.
Answer:
- All three figures have four sides and four angles.
- Figures 1 and 2 both have two pairs of parallel opposite sides.
- Figure 3 has only one pair of parallel opposite sides.
- Figure 1 has four right angles.
3. Solving problem 3 on page 91, 92 of Math textbook for Grade 5
Solution Method:
Students need to pay attention to the concept of trapezoid to add the line segment correctly: A trapezoid is a convex quadrilateral with two parallel sides.
Answer:
Additionally, there are many other ways to add more lines.
4. Solving problem 4 on page 91, 92 of Math textbook for Grade 5
Solution Method:
Students need to note how to determine right angles:
* Method 1: Observe the diagram: Indicate right angles
* Method 2: Determine right angles using a set square:
- Place one side of the set square on one side of the given angle.
- If the other perpendicular side of the set square coincides with the remaining side of the given angle, then it is a right angle; otherwise, if it does not coincide, then it is not a right angle.
Answer:
Trapezoid ABCD has two right angles, angle A and angle D, with side AD perpendicular to the base.
Additionally, side AD is also the height of trapezoid ABCD.
Guide to Grade 5 Math problem solving on pages 91, 92 (concise)
Grade 5 Math problem solving - Trapezoid
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Here is the Grade 5 Math problem solving part on pages 91, 92 in the section of Grade 5 math exercises. Students can review the Grade 5 Math problem solving part on page 88 previously solved or preview the Grade 5 Math problem solving part on pages 93, 94 to improve their Grade 5 Math learning.
