Step-by-step explanation:
The rule for a 90 degree counterclockwise is
(x,y) -> (-y,x)
so
C(-1,2) -> C'(-2,-1)
D(3,5) -> D'(-5,3)
E(1,2) -> E'(-2,1)
6 is the answer 18 divided by 3 equals to 6 so that’s the answer
The formula for this ( horizontal circular orbit with the origin at the center) is
L = mvr
If similarity ratio means the ratio between the lengths of the cubes: