00:04
We're looking at question nine, and the first thing we want to do is decide which type of special right triangle it is.
00:10
And since we can see that one angle is labeled 45, we know that this is a 45, 4590 right triangle.
00:18
And before i go any further, i like to identify that we have the two equal legs and then the hypotenuse.
00:24
And then i like to look at the relationship between those.
00:27
So if we know that one leg was called n, since n's often not used x usually is, for our variable.
00:34
In these questions.
00:35
Then our other leg would also be n.
00:37
And remember, our hypotenuse is square to two times longer.
00:41
So that would be n square root of two.
00:44
So then i can look at my picture.
00:48
They tell me the one leg is x.
00:50
I know the other leg would also be x because they're equal.
00:54
And then they tell me the hypotenuse is 15 in the picture.
01:01
So from here, hopefully you can see that right here, we can form an equation.
01:07
We can say that n square root of two, because that's one way of talking about our hypotenuse, is equal to 15, that's another way of talking about our hypotenuse...