00:01
So we're using the, we've got the perimeter of an equilateral triangle measures 48 inches and then we're asked about the perimeter of each triangle that is formed by joining the midpoints of those triangles.
00:13
So first thing we need to do is figure out the side of a blue triangle.
00:17
So we know it's an equilateral triangle, the perimeter is 48, so that means each side is 16.
00:22
Which means if we join the midpoints, then each side is going to be 8.
00:27
Which means that this is 8, because it makes equilateral triangles.
00:38
So the perimeter of the red triangle, the perimeter of the blue triangle is 48, the perimeter of the red triangle is going to be 24.
00:51
Now we're going to do the same thing and find the perimeter of the green triangle.
00:55
Each one of these is 4, so that's 12.
00:59
Then we're going to do the same thing and find the perimeter of the brown triangle, which is going to be 6.
01:05
So it looks like what we're doing here is we're dividing by 2 each time...