no 1. is a
no 2. is none of the above
Answer: 
Step-by-step explanation:
Given the right triangle in the image, you need to remember the following identity:

Observe the triangle. You can identify that:

Then, knowing these values, you can substitute them into
:

Finally, you have to solve for "x".
Therefore, the value of "x" rounded to the nearest tenth is:

Answer:
57 degrees
Step-by-step explanation:
Total measurement of any triangle is 180 degrees.
/_V=180-53.8-69.2=57 degrees
Answer:
it's cosine
Step-by-step explanation:
cos45° = x/17
<span>V = 1/3AH
A = area of base
H= hight from apex(the top of prism)</span>