Maya is using shapes to create a repeating pattern. Which rule will give Maya a repeating pattern that has a triangle as the 20th shape?

To determine the rule that will give Maya a repeating pattern with a triangle as the 20th shape, we first need to determine the pattern of shapes.

A repeating pattern can be achieved by identifying the number of sides each shape has in the pattern. In this case, let's assume that the pattern consists of shapes with varying numbers of sides.

Since a triangle has 3 sides, we can infer that the 20th shape will be a triangle if the pattern follows a regular increment of shapes with increasing sides.

Starting with the first shape, which we'll assume has 1 side, the second shape must have 2 sides, the third shape must have 3 sides (a triangle), the fourth shape must have 4 sides, and so on.

Therefore, the rule that will give Maya a repeating pattern with a triangle as the 20th shape is that each subsequent shape should have an additional side compared to the previous shape.