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
.
A. you have to do the whole 30/2 i just had this on a test. GOOD LUCK
I think straight angles ?
60° because its not hafe evin and 90° is hafe so its 60°