Classify the following as a 'triangle' or 'not a triangle' - equilateral, isosceles, right angled, circle, sphere, scalene, rectangle, square, trapezium.
'triangle', 'triangle', 'triangle', 'not a triangle', 'not a triangle', 'triangle', 'not a triangle', 'not a triangle', 'not a triangle'.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: Classify the following as a 'triangle' or 'not a triangle' - equilateral, isosceles, right angled, circle, sphere, scalene, rectangle, square, trapezium.
### Input: 
### Response: 'triangle', 'triangle', 'triangle', 'not a triangle', 'not a triangle', 'triangle', 'not a triangle', 'not a triangle', 'not a triangle'.