Scaled Copies

Figure 2 side lengths got 2 times bigger. The scale factor is 2.

Figure 4 side lengths got 1/2 the size. The scale factor is 1/2.

1 inch x 3.3 = 3.3 inches

10 feet x 3.3 = 33 feet

2,400 feet $$\div$$  200 feet = 12 inches because 1 inch to every 200 feet.

The scale factor is 2 because 2.5 x 2 = 5. This means all side lengths need to be multiplied by 2 because they are getting 2 times longer.

1.5 x 2 = 3

To create a scaled copy measurement angles remain the same. Think back to when we proved our answers with tracing corresponding angles and seeing the lines matched.

All side lengths are getting 2 times longer.

2.5 x 2 = 5

Since we multiplied by 2, 2 is our scale factor.

Scale factor of $$\frac{1}{2}$$  means to multiply all side lengths by $$\frac{1}{2}$$  . This means the side lengths of the copy are getting half the size of the original. If the side lengths are getting smaller, the shape is getting smaller.

Scale factor of 4 means you multiply all side lengths by 4. If the lengths are getting longer, the shape is getting larger.

Scale factor of 1 means you multiply all side lengths by 1. Anything multiplied by 1 is itself, so the lengths are not changing. This means the shape is going to be the same size.

1 cm x 15 = 15 cm

4 yards x 15 = 60 yards