Answer:
SAS triangle because a SAS stands for side angle side that's how u always know
Answer: 
Step-by-step explanation:
Given
The dimension of the rectangular prism is

The volume of the prism is given by 

Therefore, the volume of the prism is
.
Answer:
3/5
Step-by-step explanation:
sin theta=opposite/hypotenuse
4/5=opposite/hypotenuse
therefore opposite=4 and hypotenuse=5
for adjacent
using pythagoras theorem
a^2+b^2=c^2
opposite^2 + adjacent^2 =hypotenuse^2
4^2 + adjacent^2 =5^2
16 + adjacent^2 =25
adjacent^2 =25-16
adjacent =
adjacent=3
cos theta=adjacent/hypotenuse
=3/5
therefore the value of cos theta is 3/5
I am pretty sure it is linear decrease,