In this week, I figured out an important question:
Now we know that in this cuboid, Height equals c, Width equals b, and Length equals a. We should give a equation to express d.
How to figure out the equation?
First, add a new line. We named it “e”
Second, use the Pythagorean theorem.so
Because a^2 + b^2= c^2
So e^2=a^2+b^2, and d^2=c^2+e^2
So d^2=a^2 + b^2 + c^2
at last, use radical sing to calculate a precise number of d.
Nowadays, social media is popular in our life, but there are some mistakes need to solve. So there should be a guide to teach people how to use social media responsibly. For example, iPad is a convenient devise for some people, but someone are letting it to be the camera. Sometimes use it means you’re blocking the view for others. If no one teach it, people probably won’t sense that behaviour is wrong. The next example, many people are use phones when they are walking or something else. That’s dangerous, because when you are texting with your phone, you won’t pay attention to the way you walking, even there is a pool in front of you. There are many people made accident because of it. The last example, social media is swallowing our affection. People think chat on online is better, although their friends are front them; they think share food on Twitter is more important than have a great meal with family. We are looks like using the social media, but the true is we missed the “real” communication. That’s why there should be a guide to teach people how to use social media.