Well, basically there are
acute angle, right angle, obtuse angle ..
and also we use concurrent angles, corresponding angles, alternate angles, vertically opposite angles,..
..hope it helped a bit
B. is the answer because he can just refill the 1 gallon jug to eventually measure out 3 gallons!
List of prime numbers: 2,3,5,7,11
Both C and D equal 2 which is a prime number.
The answers are C and D
Bad idea.. because the cloth will get hot and then make your water inside warm