Proportional means that if one increases so does the other eg volume of a balloon increases if you heat it - heat is proportional to volume in gases.
Non proportional means that they don't have a similar relationship.
Answer: right triangle
Step-by-step explanation:
Answer:


Step-by-step explanation:
Given

Required
Evaluate

Separate each factor with multiplication sign

Express 8 as 4 * 2 and
as 

Split each factor

Evaluate 

Apply law of indices:


Reorder





Hence:


Centroid is the correct answer