♥ GCF (greatest common factor) is 9. Multiply all of these by 2, and the greatest number that you get (that are the same) of all, is the GCF So the GCF of like 10 20 and 30 Is 10 because thats the largest number you can multiply to get all the same.
I think that AC is greater than BC. I think this because AC is the hypothesis and the hypothesis of a right triangle is longer than the other two sides of the triangle.