Define
Rough calculating

A rough calculation or guess is approximately correct, but not exact. roughly adverb.

Step-by-step explanation:

answer;

the correct answer

just use google you beautiful person.

have a nice day < 3

answer: i'm not going to give you the answer, but some hints to work it out.

step-by-step explanation: so, if there is a straight line that means that the line angle is 180°. so we subtract the 2 angle measures provided, (15 and 38) from 180. so the answer is 180 - (38 + 15). (you have to solve the equation)