平面图形
1. Look at the figure on right,we know the length of the four lines,and two angles is ninety
degrees.Can you work out the area of the quadrangle ABCD?
2. Look at the figure on right,the length of BD,DE and EC is 2,4 and 2,F is the middle point
of line AE,the triangle ABC is 4 high,please calculate the area of triangle DEF.
3. In the following diagram, we know the length of the three lines, M is the middle
Point of line DE, please calculate the area of quarangle ABMD(the shaded part ).
4. As is shown in the diagram,each side of the exact square(正方形) equals 1.
please calculate the area of the shaded part(阴影部分)？
5. Look at the shadow of the following two parts A and B area.Can you figure out which part is bigger?(the length of sides in rectanglar a are 3,4;and in rectangular B are 2,6 )
6. The length of exact square’s side equals 1.Please calculate the area of the shaded part.container什么意思

7. The length of the sides in the following grass which is a rectangle are 16,10.And there is two roads in the middle,
one is a rectangle one is a parallelogram,then what is the area of the shaded part?
8. Seeking the following graphic area.
9. In the following diagram,large square area is 10cm2 larger than the small square area.Please calculate the area of the circle.
10. Find out which of the following area of two triangles are equal?
11. There is a litter square water pool.It is 5 meters long each side.There is grass around the pool everywhere.There is a goat tied to point A,the rope is 6 meters long.How many square meters of grass can the goat get at most?
专题五： 立体图形
一、长方体和正方体面积及体积计算：
二、典型例题
例1：2.1 square meters=(      ) square decimeters;2.14 cubic merters=(      )cubic decimeters  0.05 cubic merters=(      )liters=(      ) milliliters.
中文意思：___________________________________________________________________
_____________________________________________________________________________   
答案：_______，_______，________，_______。
例2：Please try to figure out the number of surfaces,and the number of the edges in the following diagram.
中文意思：___________________________________________________________
Answer:______,_______.
解析：surfaces:_______,edges _______.同学们自己填上中文意思哦。
例3：We need _____________cubes with 5 cm side at least to make a bigger cube.
中文意思：___________________________________________________________
例4：The floor space of a cube is 2 cm2,then its space area is _____________.
中文意思：___________________________________________________________
例5：If the edges[edʒ] of a cube[kju:b] increases to three times,then how much times will its area and volume [ˈvɔlju:m] increase?
中文意思：___________________________________________________________
   
例6：If we increase the volume of a cube with 2 cm edges by 208 cm3,we get a cube still,then how much centimeters does the edges increse by?
中文意思：___________________________________________________________
例7：The surface area of a cuboid is 33.66 dm2,the length and the side of one surface is 2.3 dm and 2.1 respectively,then what is the volume of the cuboid?
中文意思：___________________________________________________________
_____________________________________________________________________
例8：If you unfold（展开） the cube on the right,which of the following is possible(可能的)?Answer:______
中文意思：___________________________________________________________
例9：As shownd,there is a cube(4×5×6) ,it is made of 120 small cubes ,if we paint(涂) it red,then how much cubes is there with one surface red ,two surfaces red and three surfaces red respectively(分别的)?
中文意思：___________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
 
当堂演练：
1.The edge of a cube is 6cm,then the sum of its edges are _____________cm,its surface is _____________ cm2,and its volume is _____________ cm3.
2.There are five cubes with 2 cm ,we join them to make a cuboid,so the surface of the cuboid is _____________ cm2, and its volume is _____________ cm3.
3.The stretch out view of the cube is (    )
3.As showed,we cut a square with 2 cm side from a rectangle with 13cm length and 9 cm wide,then we fold it along the dotted line(虚线) to make a cuboid container(容器),how much square centimeter is the volume of container?