In this image, we have two polygons: one labeled as the "preimage" and the other labeled as the "image." The task is to find at least one missing side length by forming an equation.

From the image, we can observe that the polygons are similar, meaning that the side lengths of the "image" and "preimage" are proportional. Here's what we know:

Preimage (larger shape):

• $AB = 3.5$
• $BC = 4$
• $CD =$ (unknown)
• $DA = 5.9$

Image (smaller shape):

• $A'B' =$ (unknown)
• $B'C' = 1.3$
• $C'D' = 2$
• $D'A' =$ (unknown)

Since the polygons are similar, we can set up a proportion using corresponding sides.

For example, if we set up a proportion between the side lengths $BC$ and $B'C'$, we can solve for another side. The ratio between corresponding sides is constant.

Step 1: Set up the proportion

We know that: $\frac{BC}{B'C'} = \frac{AB}{A'B'} = \frac{CD}{C'D'} = \frac{DA}{D'A'}$ So, let's use the known lengths to find one of the unknowns. Using the side $BC$ and $B'C'$, we get: $\frac{BC}{B'C'} = \frac{4}{1.3}$ This simplifies to: $\frac{4}{1.3} \approx 3.08$ So, the ratio of the side lengths is about 3.08. Now, we can use this ratio to solve for one of the missing sides, for example, $AB$ and $A'B'$.

Step 2: Solve for $A'B'$

Using the ratio, we have: $\frac{AB}{A'B'} = 3.08$ Substitute $AB = 3.5$: $\frac{3.5}{A'B'} = 3.08$ Now, solve for $A'B'$: $A'B' = \frac{3.5}{3.08} \approx 1.14$

Thus, the length of $A'B'$ is approximately 1.14 units.

Would you like more details on another side or any specific clarification?

Here are 5 related questions for further exploration:

1. How can we use proportions to find the length of $D'A'$?
2. How would you find the value of $CD$ using a similar method?
3. What is the importance of similarity in solving for unknown side lengths?
4. Can you verify the proportionality for all pairs of corresponding sides?
5. What other mathematical relationships are used in transformations like this?

Tip: When working with similar polygons, always ensure you correctly match corresponding sides to set up the right proportions.