00:02
Alright, here we know the slope for a wheelchair ramp for somebody's home has to be 1 over 12, which means we go up one.
00:11
Do that in a darker color.
00:13
We go up one for every 12 units across we go.
00:16
So that's our slope.
00:18
If the vertical distance from the ground to the door bottom is two and a half feet, then how long does find the distance the ramp has to extend from the home in order to comply with the needed slope? so we want to know this distance.
00:34
So basically we're going to just use similar triangles.
00:37
We've got a right triangle here, and we know that it has to be similar to this right triangle.
00:42
So we're just going to solve using proportions.
00:45
This, the short side on the model triangle, the ratio 1 to 12 has to be the same.
00:55
2 .5 to x.
00:58
So these two sides correspond and these two sides correspond...