Write a ratio in simplified form of the vertical length to the horizontal length of the red triangle.

As an AI language model, I cannot see the image that you are referring to. Please provide more information or context so that I can assist you better.

To find the ratio of the vertical length to the horizontal length of the red triangle, we first need to identify which sides of the triangle correspond to the vertical and horizontal measures.

Assuming the red triangle is a right triangle, with one of the sides perpendicular to the base, the vertical length would be the length of the side perpendicular to the base, and the horizontal length would be the length of the base of the triangle.

Let's say the vertical length is represented by 'v' and the horizontal length is represented by 'h'.

Therefore, the ratio of the vertical length to the horizontal length can be written as:

v : h

This is the simplified form of the ratio.