What is the area of this parallelogram?
这个平行四边形的面积是多少？
You see, it does look like a parallelogram.
你看，它的确看起来像一个平行四边形。
The parallelogram still has the same area, and it's still on the same plane.
这个平行四边形仍然有相同的面积，它仍然在同一个平面上。
What's the area of each parallelogram?
每个平行四边形的面积各是多少？
OK, so now what the area of this parallelogram?
那么现在这个平行四边形的面积是多少？
And, you see, it does look like a parallelogram.
你们也看到了，它的确看起来像一个平行四边形。
Chris: Then it must be a parallelogram, right?
克里斯：那么它应该是一个平行四边形，对吗？
These are the opposite sides of the parallelogram.
这是平行四边形的对边。
Now, above that I will have a parallelogram on my surface.
现在在上方的曲面上，有一个平行四边形。
Let's try to understand how big this parallelogram is.
这个平行四边形有多大呢？
If it is small enough, it will look like a parallelogram.
如果它足够小，它可以近似成平行四边形。
There's another way you can do it and I call that "the parallelogram method."
矢量相加还有一种方法，我称为“平行四边形法。”
The fourth point is extrapolated from the first three to form a parallelogram.
可从前三个点推断出第四个点以形成一个平行四边形。
That's 5. OK, this parallelogram is apparently five times the size of this square.
答案是5，目前为止，这个平行四边形的面积,是那个正方形面积的5倍。
That's 5. OK, this parallelogram is apparently five times the size of this square.
答案是5，目前为止，这个平行四边形的面积,是那个正方形面积的5倍。
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