00:01
So find the surface area and volume of a 100, i'm sorry, not 100, 10 centimeter high, right prism.
00:09
Okay, so this is 10 centimeters, with triangular bases having 18 centimeters edges.
00:16
So this is 18, this is 18, and this is 18, okay? round to the nearest whole number.
00:23
So i need to find this height in order to find the surface area.
00:28
So if this is 18, then this is 9 and this is 9.
00:33
So i have to do 9 squared plus b squared equals 18 squared.
00:38
I'm using the pythagorean theorem to find the height of the triangle.
00:41
So 9 squared is 81 plus b squared equals 18 squared is 324, and b squared equals 324 minus 81 is 243.
00:59
And then the square root of 243 is, we'll say, 15 .6.
01:11
So this is 15 .6...