Answer:
5 feet
Step-by-step explanation:
15 divided by 3 equals 5
<span>3) This one is a little different, since you're finding the angle instead of the side. You can denote the angle to be the variable x. Thus:
cos x = 14 / 26
Use a calculator to divide out 14/26, then round to four decimals.
cos x = 0.5385
Now go to the cosine chart and find which angle has the cosine 0.5385. It's a strange problem they gave you, because the chart doesn't have a value that matches it (kind of confusing if you ask me). But you can find two angles it is between. Notice that cos 57° = 0.5446 and cos 58° = 0.5299. Thus, the angle must be between those two. It turns out it is closer to 57°, so you can say:
x = 57° </span>
So you first multiply the found dimensions: 10*3 = 30. Now you have to divide by 2 since it is a triangular prism: 30/2 = 15.
30 (the volume) divided by 15 is 2.
Your missing dimension is 2 feet.
Hope this helps,
Loafly
