The formula states that:
Faces + Vertices - Edges = 2
So 21 + V - 49 = 2 => V = 2+49-21 = 30
Answer A!
Only one triangle because 70+30+80=180 and 1 triangle has in total 180°
Water carried = 1/2 gallon
Water drank =
= 2/3 of 1/2 gallon
= 2/3 × 1/2
= 2/6
= 1/3 gallon
Answer: they have to equal 180 degrees?
Step-by-step explanation:
Not entirely sure tho
