## How do you find the area of similar figures?

Areas of similar triangles can be solved by relating their ratio with the ratio of the pair of corresponding sides. For any two similar triangles, the ratio of the areas is equal to the square of the ratio of corresponding sides.

**How do you find the missing length of a compound shape?**

length. To find the missing horizontal length, we will look at the values of the other horizontal lengths. Looking at the composite shape, the side that is 12 cm long is the same as both the missing side plus the side that is 4 cm long. We can therefore find the missing length by subtracting 6 cm from 9 cm.

**How can you decide when given side lengths of the two triangles are similar?**

The SAS rule states that two triangles are similar if the ratio of their corresponding two sides is equal and also, the angle formed by the two sides is equal. Side-Side-Side (SSS) rule: Two triangles are similar if all the corresponding three sides of the given triangles are in the same proportion.

### How to find a missing measurement on a figure?

Want to find a missing measurement on one of the figures? You could use a scale factor to solve! In this tutorial, learn how to create a ratio of corresponding sides with known length and use the ratio to find the scale factor.

**How to find the size of a similar figure?**

Similar figures are identical in shape, but not necessarily in size. A missing length, area or volume on a reduction/enlargement figure can be calculated by first finding the scale factor. We already know that if two shapes are similar their corresponding sides are in the same ratio and their corresponding angles are equal.

**How to calculate the missing area of a shape?**

We already know that if two shapes are similar their corresponding sides are in the same ratio and their corresponding angles are equal. When calculating a missing area, we need to calculate the Area Scale Factor. Area Scale Factor (ASF) = (Linear Scale Factor)2

## How to calculate the missing length of a triangle?

To calculate a missing length, draw the two triangles separately and label the lengths. To calculate the scale factor, divide the two corresponding lengths. The scale factor of enlargement is 1.5. Calculate the length TR. To calculate a missing length, draw the two triangles separately and label the lengths.