Circle times square equals triangle, circle plus circle equals triangle minus circle minus circle, what are circle, triangle and square?

Circle times square equals triangle, circle plus circle equals triangle minus circle minus circle, what are circle, triangle and square?

Circle x square = triangle. (1)
Circle + circle + circle = triangle circle circle. (2)
According to (2), triangle = 5 times circle
Also, according to (1): circle × square = triangle
So, circle x square = 5 times circle
| square = 5