1. When observing an object, the line of sight should be ().

2. A cube * * * has () faces. No matter which angle we look at, we can only see () faces of the cube at most.

3. A brick, we can't see its front and () side at the same time, nor can we see its left and () side at the same time.

When two people observe the same object, they see different shapes. The reason for this phenomenon is the difference of observers.

5. At least () small cubes can form a cuboid.

Second, count and fill in.

Third, multiple choice questions. (Put the serial number of the correct answer in brackets)

1. If an object has all the figures seen from the front and above, then the object is ().

2. There is an object from the front and side. Seen from above, the shape of this object is ().

3. In the picture below, from the side, it is not ().

Fourth, in the activity class, Naughty made the following different shapes with four cubes.

1. Seen from the front, the shapes are () and (), () and ().

2. Seen from the side, the shapes are () and ().

3.a is () shaped from the front and () shaped from the side.

Fifth, draw a picture.

Sixth, color.

1. Color the figure from the front.

2. Color the figure seen from the left.

3. Color the figure from the front.

4. Color the top view.

5. Colour the figure seen from the left.

7. Have a look and fill in.

1. Seen from the left, the shapes are yes (), yes () and yes ().

2. Seen from above, the shapes are () and ().

3. The shape seen from the front is ().

Eight, solve the problem.

1. The shape from the left is, and the shape from above is. How many small cubes do you need to build such a three-dimensional figure?

2. Use six identical cubes to make the following appearance.

Judging from () and (), the shapes of these three objects are exactly the same. Seen from the plane (), these three objects have different shapes.

3. Draw an object from above, front and left.

Xiao Ming uses a small cube to spell out a three-dimensional figure, so that the following two figures can be obtained from the left and from the top respectively.

Left: Above:

How many cubes do you need at least and how many cubes do you need at most to build such a three-dimensional figure?

Reference answer

I. 1. Vertical 2.6 3 3. Right back 4. Position 5.2

Two. 5 6 5 5

Three. 1.A 2。 C 3。 C

Fourth, 1. Fbi secret service. 3 BC. Rectangular square

Verb (abbreviation for verb) negligence

VI. Hint: The color is

1.2.3.4.5.

Seven, 1.46 ③, 52.543. ①, ③

Eight, 1.4 2. On the positive side,

3.4. At least 5 and at most 9.