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Authoritative PPT Summary
"Understanding of Parallelograms" Preliminary understanding of parallelograms PPT courseware
Learning requirements
1. Be able to identify which parallelogram is a parallelogram from specific objects or graphics, and look for and discover parallelograms in your own life.
2. Through observation, measurement and hands-on operation, initially grasp the characteristics of parallelograms, and understand the similarities, differences and relationships between parallelograms, rectangles and squares. Can draw parallelograms on graph paper.
3. Cultivate observation skills, hands-on operation skills, and develop spatial concepts.
We often see such graphics in our lives:
Please carefully observe the graphics on the fences, bonsais, elevators, and security doors painted above.
Do it:
Prepare two small sticks of the same length and two small sticks of the same short length. Use the two sticks of equal length as opposite sides and nail them into a rectangle. Then pinch the two opposite corners with your hands and pull them in opposite directions. While pulling, see what shape it forms.
A quadrilateral with two sets of opposite sides that are parallel is called a parallelogram.
Think about rectangles and squares. Are opposite sides parallel?
According to this property, think about the inclusive relationship between rectangles, squares and parallelograms.
summary:
What are the characteristics of the sides of a parallelogram?
Opposite sides of a parallelogram are parallel and equal, and the four angles are not necessarily right angles.
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"Understanding of Parallelograms" Preliminary understanding of parallelograms PPT courseware 3:
"Understanding of Parallelograms" Preliminary Understanding of Parallelograms PPT Courseware 3 Do you know them? Characteristics of a rectangle: it has four sides, the opposite sides are equal, and the four angles are right angles. Characteristics of a square: all four sides are equal and all four angles are right angles. Children,..
"Understanding of Parallelograms" Preliminary understanding of parallelograms PPT courseware 2:
"Understanding of Parallelograms" Preliminary Understanding of Parallelograms PPT Courseware 2 These figures are also figures surrounded by four sides. We call such a quadrilateral a parallelogram. Can you use two identical triangle rulers to form a parallelogram? Put a...