What is the scale factor to transform a circle with diameter 3 into a circle with diameter 25?

8

22

-22

`25/3`

Given two similar right triangles ABC and DEF, which of the following is not necessarily true?

The left side of △ABC corresponds with the left side of △DEF.

The hypotenuse of △ABC corresponds with the hypotenuse of △DEF.

The shortest side of △ABC corresponds with the shortest side of △DEF.

All of these are always true.

What must the scale factor be in order to transform a preimage into a similar image that is smaller?

zero

negative

less than 1

zero or negative

If a red cube is 10 times as tall as a blue cube, how many blue cubes can fit into the red cube?

10

30

100

1000