Which story problem could be solved using the given equation? asap!

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why? a. point c could be the interior of aob but it is not the only case b. point c is the interior of aob c. point c is not the interior of aob d. the given is not possible for the plane geometry answer

Similarly fie each expression 18,19,20

Asap 25 pts + brainliest to right/best answer only answer if you know for sure