4 quarts make 1 gallon :)
Hope i helped u!
S(1,4) became S'(-4,1), so the transformation appears to be
... (x, y) ⇒ (-y, x)
Line RS pointed east; now R'S' points north. The tansformation is a ...
... counterclockwise rotation of 90°.
That would be obtuse because is u add 60+60 it will give u 120 and that is more that 90 meaning is neither acute or right so its obtuse.