00:01
Shaped like a rectangular prism shown below.
00:02
The room has a security system that is triggered by two laser beams that stretch from point a to point d.
00:10
So it stretches from point a to point d and point b to point c.
00:21
Use the sketch feature in desmos to show your thinking how many feet of a laser beams are there.
00:30
So the first thing that i need to do is so i'm i need to find the length of the diagonal going from a, just at least one of the sections, a going to d.
00:44
Okay, that's on the inside diagonal.
00:48
So in order to find the inside diagonal, i already have that 15 feet is going from a to this bottom section.
00:59
I need to then find the length going from the diagonal of, this section.
01:08
So i have to do, i have to find the pythagorean thermo, the hypotenuse of this section right here.
01:19
So i have to find the hypotenuse, okay, of this rectangle here, the bottom piece.
01:25
So i'm going to do 12 squared plus 35 squared.
01:30
That equals the hypotenuse of going from d to the bottom of line segment a.
01:38
So c squared.
01:40
So i have 144 plus 35 squared is 1225.
01:49
That equals c squared...