00:01
So in this question, we're given that we have a triangle with points f, i, and p.
00:07
And then we're given the point after the dilation.
00:13
So f prime, i, and p prime, and p prime.
00:16
It asks for the verticals.
00:19
I'm going to assume that that's vertices.
00:21
And it also gives us the scale factor is one -fourth.
00:27
So normally when we have a scale factor, we're multiplying the original and by that scale factor.
00:35
But since we're going the opposite direction, we're actually going to divide.
00:41
And something that happens when you divide, so like if we were to divide 8 by 1 fourth, we are actually multiplying by 4 instead of dividing by 1 4th.
00:54
So that's just a little trick we're going to use instead of dividing by the fraction, we're going to be multiplying by the reciprocal.
01:02
Is actually what we call it.
01:05
So i'm going to multiply each of these points.
01:07
So f prime is going to be, so 1 times 4, and then negative 3 over 2 times 4.
01:18
That's going to give me my original point f.
01:23
Okay.
01:24
So 1 times 4 is 4...