00:01
Okay, so let's learn how to find the height of a tree using proportions.
00:06
So we have a guy who is six feet tall, and he casts a four -foot shadow.
00:12
And we also have a tree that is x feet tall, and we don't know how tall it is, so i called it x.
00:18
And it casts a 24 -foot shadow.
00:21
So because we're working with shadows, we're going to use proportions, because the shadows are proportionate to each other.
00:28
So let's go ahead and write a proportion for the tree.
00:33
So the tree is x amount tall over the 24 foot shadow that it casts, and that's equal to the man who is six foot tall, and he casts a four foot shadow.
00:52
So when we're working with these proportions, this is going to equal to this.
00:58
So all we have to do is just solve...