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Anonymous users2024-02-05I am a member of the Math Tutoring Group and am glad to have the opportunity to help you improve.
Your adoption is what keeps me going
If you have any new questions, please ask me for help, it is not easy to answer the questions, please understand
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Anonymous users2024-02-041。If you want to draw the distance, you can use the Pythagorean theorem, let the distance between the bottom of the ladder and the wall be x, 25 2=x 2+24 2 to get x=7 and the distance is 7 meters.
The second question should not be that it slipped 4m. The top slides down 4 meters, that is, the top of the ladder is 20m from the ground, but the length of the ladder is still 25 meters without change, and the distance in the horizontal direction is y at this time, then according to the Pythagorean theorem, 25 2 = y 2 + 20 2 is obtained, and y = 15 is obtained, and the horizontal slide at this time is not 4 meters by y-x.
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Anonymous users2024-02-03(1) The Pythagorean theorem is the third time d=(25 2-24 2) (1 2)=7;
2) No, the length of the two sides is 20 25 so the third pass is (25 2-20 2) (1 2) = 15, that is, the slide is 8 meters.
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Anonymous users2024-02-02(1) The square of 25 - the square of 24 = 625-576 = 4949 square = 7
2) The top of the ladder slides down 4 meters, so the top of the ladder is 20 meters from the ground, then the bottom of the ladder is perpendicular to the wall.
25 squared - 20 square = 225, 225 open square = 15, at this time 15 meters, it turned out to be 7 meters, so the ladder.
The bottom did not slide 4 meters horizontally.
It should be right, and if it's wrong, please advise. o(∩_o ！
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Anonymous users2024-02-01(1) From the Pythagorean theorem, the vertical distance of the bottom of the ladder from the wall x = root number (25 2-24 2) = 7
2) If the top of the ladder slides down 4 meters, the top of the ladder is 20 meters from the ground, and the vertical distance between the bottom of the ladder and the wall x = root number (25 2-20 2) = 15
15-7=8 does not equal 4
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Anonymous users2024-01-31Pythagorean theorem: the square of a + the square of b = the square of c.
Because in a right-angled triangle, the right-angled side opposite by the 30° angle is equal to half of the hypotenuse, so when a=1, c=2a=2 b=root, number 3, because in a right-angled triangle, when there is 45°, the two right-angled sides are equal, so when a=1, b=a=1 c=2
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Anonymous users2024-01-30At 30 degrees, the ratio is 1:2: root 3, c = 2, b = root 3
At 45 degrees, the ratio is 1:1: root 2, c = root 2, b = 1
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Anonymous users2024-01-29What's the problem, what do you ask for?
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Anonymous users2024-01-28Enlargement front right triangle area = 6 times 8 and divided by 2 = 24
The enlarged area is 8 cm as the right angle, and the area is = 8 times 8 and divided by 2 = 32
So the enlarged area is 24+32=56
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Anonymous users2024-01-27You can solve it by drawing your own pictures, so you don't have to go through the trouble of finding answers, it's better to do it yourself.
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Anonymous users2024-01-26Because 3 2; +4 2;=5 2;i.e. a 2; +b 2;=c 2;According to the inverse of the Pythagorean theorem, the triangle with a, b, and c is a right triangle, and a, b, and c are the angular-resistant edges of the straight nucleus, and c is the hypotenuse, and the area of the hypotenuse is 3*4
Simplification: [5xy (x -3xy)-(3x y) 5xy) [5x 2y 2(x-3y)+27x 6y 6] 25x 2y 2). >>>More
25-2)/(25+1)=(60-2)(t+1)t=
95-5) (100-0) = (32-5) (t-0) t = 30 degrees Celsius. >>>More
If both balls of equal volume A and B float on the water, then the buoyancy received by the two balls of A and B is equal to the gravitational force received by A and B respectively, but A and B are only equal in volume and do not know the density, so the amount of buoyancy they receive cannot be determined, so D is chosen. >>>More
When doing reading, you should first skip the content of the article, that is, sweep the beginning and end, and then read the questions carefully, it is best to memorize them silently, and then read the article again, write down the answers that can be found while reading, and the rest can be answered almost when the article is finished. When writing an essay, write the best topic to write, try to think of what you can think of, don't waste time thinking about the overall content, just think of the general structure, and then write and think about it according to the general structure, if you still have time to read the content after writing, see what needs to be modified and added. Submit the paper at the end.
This can be solved using inequalities.
For the real numbers a, b, we always have (a-b) 2>=0, so we have a2+b 2>=2ab >>>More