An aquarium tank holds 143 gallons of water. how much is this in liters? conversion: 1 gallon is 3.8 liters

5.83,-0.10 is 2pi/3

-5.66,-1.41 is just less than 2pi, 7pi/4

-2.83,5.10 is less than 3pi/2, 4pi/3

5,-3 is obviously pi/2

Step-by-step explanation:

Starting point -3,-5 is in 3rd quadrant, slope 5/3.

Angle is zero.

Smallest angle is 5,-3, which is perpendicular to -3,-5, as dot product is zero and slope is -3/5. In 4th quad. angle is pi/2

Next larger angle is 5.83,-0.10, a little more than pi/2 and less than pi; the only such angle is 2pi/3. Also in 4th quad but further around.

None of the vectors are in 1st quad. 3,5 would be angle pi.

Next is -2.83,5.10, in 2nd quad. Slope is -5.1/2.83, steeper than the perpendicular slope 5/3, so angle is less than 1.5 pi. 4pi/3 = 1.33pi, but 5pi/3 = 1.66pi, too big. Only such angle is 4pi/3.

Last is -5.66,-1.41, back in 3rd quad, nearly whole way around. 7pi/4 = 1.75pi