Question

2 triangles are shown. The second triangle is rotated 90 degrees to the right. A point is between both triangles.

Examine the rotation. Which best describes point D?

angle of rotation
center of rotation
image
pre-image

Answer 1

In the context of the problem you describe, the best term to describe point D, which is positioned between the two triangles, would be **image** or **pre-image**, depending on its position relative to the triangles.

- If point D is the position of the point after the 90-degree rotation of the second triangle, it would be called the **image**.
- If it refers to the position of the point before the rotation, it would be called the **pre-image**.

Since the problem mentions the point is between both triangles and does not specify which triangle was moved or where point D is in relation to them, it's challenging to definitively assign one term. However, typically:

- **Angle of rotation** refers to the degree through which the triangle is rotated (in this case, 90 degrees).
- **Center of rotation** is the point about which the triangle is rotated.

Based on the given options, if point D is the position after rotation, it is best known as the **image**. If it is the original position before rotation, it would be the **pre-image**.