In the field of mathematics, the art of asking questions is more important than the art of answering them. When I was a student, it was also very important to make mathematics manuscripts. Below is a collection of pictures of making mathematics handwritten papers provided by the editor of Xuela. I hope you like it.
Digital Lantern Riddles
1. People are as big as me, but heaven is not as big as me. (Type one word)
"Type a word" asks you to guess a word. According to the description in the question, we can conclude that the answer is "one". Because the character "人" has a horizontal line across the middle, it becomes the character "大", and the character "天" does not have a horizontal line on the top of the head, so it becomes the character "大". Therefore, the word "一" satisfies this condition.
2. Up is on bottom, bottom is on top, stuck in the middle. (Type one word)
The lower part of the character "上" is a horizontal line, the upper part of the character "下" is also a horizontal line, and the middle part of the character "Ka" is also a horizontal line. So the answer is the word "一" composed of one horizontal line.
3. There is no heaven and no earth, and there is no such thing as industry and agriculture. (Type one word)
There are two horizontal lines in the word "天", but there are no two horizontal lines in the word "地"; there are two horizontal lines in the word "work", but there are no two horizontal lines in the word "nong". So the answer is the word "二" composed of two horizontal lines.
4. Whitening soap. (Type one word)
Whitening soap is a kind of soap that can make white clothes whiter when washed with it. What word becomes "soap" when the word "白" is added to it? Of course it's the word "seven". It can be seen that the answer is seven.
The above riddles all involve guessing a word, and the guessed word is a number. More riddles have quantitative relationships in the riddles, and the answers are not necessarily related to numbers. Let’s take a look at a few examples.
5. Keep half and give up half. (Type one word)
Keep half of the word "guarantee", discard half of the word "fang", and put the remaining two halves together. What word can be formed? It can only be the word "imitation". The answer is imitation.
1 Assume any ΔABC, draw the median line DE
parallel to BCIn ΔADE, create high AF next to DE
Then rtΔAFD, AFE, and trapezoid BCED can be combined to form a rectangle with the same area as ΔABC
2 For any quadrilateral ABCD, E is the midpoint of AB, F is the midpoint of BC, G is the midpoint of CD, H is the midpoint of DA, and EG intersects FH at point I
Have EI=IG,HI=FI
(The quadrilateral EFGH is a parallelogram. It can be proved that the auxiliary line AC can be used, EF is parallel to AC, HG is parallel to AC, EF is parallel to HG, and EH is parallel to FG in the same way)
Cut the quadrilateral ABCD along EG and FH to get four quadrilaterals (AE`I`H`;BF`H``E``;CG`H```F``;DH``I``` `G``)
Let AE` coincide with BE``, BF` coincide with CF``, CG` coincide with DG``, DH` coincide with AH``, and the quadrilateral I`I``I```I` can be obtained ```
This quadrilateral is a parallelogram
I don’t need to tell you from parallelogram to rectangle
They are inserted into word or ppt in the form of pictures. In fact, the concept of pictures includes clipart.
Clip art comes with the software (Microsoft Office). It is some vector images in wmf format (of course some are in emf format). There are many categories in the software. It is inserted into the ppt. The background is transparent and does not It will affect the subsequent content, which ordinary pictures cannot do. These cliparts are placed in the folder C:\Program Files\Microsoft Office\media, you can look for them.
The pictures include various formats, which are inserted from outside (software), generally including jpg, jpeg, bmp, gif and other formats.
The AutoShapes are various geometric figures drawn using the drawing tools in the drawing toolbar of the software.
These three types can be called pictures. When inserted into the ppt, they have eight control points, plus a rotation control point.
1. Stacking of "objects" such as graphics: If the object inserted into the document wants to overlap the text, you must first set the "Text Wrapping" in the picture format to "No Wrapping" (at this time the picture floats above the text), " Set "Stacking Layer" to "Place Below Text" to stack the image below the text to form a "background" or "watermark".
2. Edit wrapping vertices: Click "Edit wrapping vertices" in "Text wrapping" on the "Picture" toolbar. Many vertices will appear around the picture. Drag them to adjust the position of the text environment. Hold down the Ctrl key and then Click the connection between vertices (vertex) to add (or delete) vertices.
3. Restoration after cropping graphics: You can use the "Crop" tool in the "Picture" toolbar to drag in reverse to restore the cropped part.
4. Rotate and edit: Insert "clip art" into the document. If you first "Ungroup" and then "Group", you can rotate it as a whole. "Ungroup" can also modify each component (clip art inserted as a file can be edited by double-clicking).
5. Reproduction of pictures: Pictures inserted into the document sometimes disappear when changing the display ratio and other operations. At this time, click the "Select" button on the "Drawing" toolbar and the missing pictures will disappear. No place to hide.
6. "Selection" of pictures or other objects: When pictures, etc. are placed under text or other objects, sometimes they can no longer be selected with the mouse. As long as you click the "Select" icon in "Drawing" and then move to the object, you can click "or draw a frame" to select (select one and then press Tab to switch to different levels of selection).
7. Move or copy objects: Hold down Shift and then drag to move objects such as graphics vertically or horizontally (press Ctrl at the same time to copy) to a new location.
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