Các câu hỏi tương tự
The worker uses 12 cubic blocks to build a 2-step flight of stair as the figure below. To
prevent it from getting damaged, he covers all the surfaces of the stair with square
hard tiles of side length 15cm, except for the bottom. Find the total area of the hard
tiles needed for this stair in m2
Given the rectangular land and its length is 3/4 km . Its width is shorter than its length by 1/12 km.
Then the area of land is ......... km2 (round to one decimal place)
Given the rectangular land and its length is 3/4 km . Its width is shorter than its length by 1/12 km.
Then the area of land is ......... km2 (round to one decimal place)
For Xoy right angle, point A on Ox ray, ray Oy.lay point B on point E on the beam of rays Ox, point F on the beam of rays Oy puzzle that OE = OB, OF = OA.
a, prove that AB = EF and EF square AB
b, Call M, N wrong turn is the midpoint of AB and EF. Prove that triangle square omn weight
I. Read the following passage and decide if it is T or F.Many people still believe that natural resources will never be used up. Actually, the world’s energy resources are limited. Nobody knows exactly how much fuel is left. However, we also should use them economically and try to find out alternative sources of power. According to Professor Marvin Burnharm of the New England Institude of Technology, we have to start conserving coal, oil and gas before it is too late; and nuclear power is the on...
Đọc tiếp
I. Read the following passage and decide if it is T or F.
Many people still believe that natural resources will never be used up. Actually, the world’s energy resources are limited. Nobody knows exactly how much fuel is left. However, we also should use them economically and try to find out alternative sources of power. According to Professor Marvin Burnharm of the New England Institude of Technology, we have to start conserving coal, oil and gas before it is too late; and nuclear power is the only alternative.
However, many people do not approve of using nuclear power because it’s very dangerous. What would happen if there was a serious nuclear accident? Radioactivity causes cancer and may badly affect the future generations.
The most effective thing is that we should use natural resources as economical as possible.
Statements | T/ F |
1. Natural resources will run out. 2. The world’s energy resources are unlimited. 3. We know exactly how much fuel is left. 4. We should use fuel economically. 5. According to Professor Marvin Burnham, nuclear power will be used as a substitute for natural resources. 6. Many people disagree to use nuclear power as an alternative energy. 7. Radioactivity from nuclear power causes cancer and may have bad effect on the future generations. 8. Natural resources should be used as economical as possible. | 1…… 2…… 3…… 4…… 5……
6…… 7……
8……
|
Given the Triangle ABC and the point M inside the triangle (M don't belong on any sides of triangle).let I be the intersection point of the line BM and the side AC
a, compare MA to MI+MB,then prove that MA +MB<IB+IA
b, compare IB to IC+CB, then prove that IB+IA<CA+CB
c, Demonstrate the inequality MA+MB<CA+CB
Given the Triangle ABC and the point M inside the triangle (M don't belong on any sides of triangle).let I be the intersection point of the line BM and the side AC
a, compare MA to MI+MB,then prove that MA +MB<IB+IA
b, compare IB to IC+CB, then prove that IB+IA<CA+CB
c, Demonstrate the inequality MA+MB<CA+CB
In the figure below, x Câu 2 Find the measure of angle J if widehat{K}29^o K 29 o and angle J and K are supplementary. Answer: widehat{J} J ^o o . Câu 3 In the figure below, x Câu 4 In the figure below, x Câu 5 Solve: |2x-3|-43∣2x−3∣−43, where xx is a negative number. Answer: xx Câu 6 Calculate: 9+|-6|:1^2 9+∣−6∣:1 2 Câu 7 Compare: dfrac{36}{27} 27 36 dfrac{4}{3} 3 4 Câu 8 Find the negative number yy such that |y+dfrac{7}{2}|-dfrac{1}{2}4∣y+ 2 7 ∣− 2 1 4. Answer: yy Câu 9 Find xx su...
Đọc tiếp
In the figure below, x = Câu 2 Find the measure of angle J if \widehat{K}=29^o K =29 o and angle J and K are supplementary. Answer: \widehat{J}= J = ^o o . Câu 3 In the figure below, x = Câu 4 In the figure below, x = Câu 5 Solve: |2x-3|-4=3∣2x−3∣−4=3, where xx is a negative number. Answer: x=x= Câu 6 Calculate: 9+|-6|:1^2 =9+∣−6∣:1 2 = Câu 7 Compare: \dfrac{36}{27} 27 36 \dfrac{4}{3} 3 4 Câu 8 Find the negative number yy such that |y+\dfrac{7}{2}|-\dfrac{1}{2}=4∣y+ 2 7 ∣− 2 1 =4. Answer: y=y= Câu 9 Find xx such that \dfrac{32}{2^x}=2 2 x 32 =2. Answer: x=x= Câu 10 Find nn such that \dfrac{(-4)^n}{64}=-16 64 (−4) n =−16. Answer: n=n= Cần gấp nhé