NNAT Mirror Images and Rotations 2 — Questions and Answers
Question 1: A triangle points to the upper-right corner. When reflected across a vertical line, where does the triangle point?
- Upper-left corner (Correct answer)
- Lower-right corner
- Upper-right corner
- Lower-left corner
Correct answer: Upper-left corner
A vertical reflection flips left and right, so upper-right becomes upper-left.
Question 2: A shape is rotated 90° clockwise. If you then rotate it 90° counterclockwise, what is the result?
- The original shape orientation (Correct answer)
- The shape rotated 180°
- The shape flipped vertically
- The shape flipped horizontally
Correct answer: The original shape orientation
A 90° clockwise rotation followed by a 90° counterclockwise rotation cancels out, returning the shape to its original orientation.
Question 3: An arrow points left. After a 180° rotation, which direction does it point?
- Right (Correct answer)
- Left
- Up
- Down
Correct answer: Right
A 180° rotation reverses direction completely, so left becomes right.
Question 4: Which property of a shape is preserved when it is reflected across a line?
- Size and shape (Correct answer)
- Orientation
- Handedness
- Order of vertices when read clockwise
Correct answer: Size and shape
Reflections preserve size and shape (they are isometries) but change orientation and handedness.
Question 5: A flag with a star in the top-left corner is placed in front of a mirror. Where does the star appear in the reflection?
- Top-right corner (Correct answer)
- Bottom-left corner
- Top-left corner
- Bottom-right corner
Correct answer: Top-right corner
A vertical mirror reflection swaps left and right, moving the star from top-left to top-right.
Question 6: A shape is rotated 270° clockwise. This is equivalent to a rotation of how many degrees counterclockwise?
- 90° (Correct answer)
- 180°
- 270°
- 360°
Correct answer: 90°
270° clockwise equals 90° counterclockwise because both bring the shape to the same position.
Question 7: The letter 'J' is reflected across a horizontal line. What does the reflection most resemble?
- A J flipped upside-down (Correct answer)
- A mirror-image J (reversed left-right)
- The letter 'L'
- The original letter J
Correct answer: A J flipped upside-down
A horizontal reflection flips the image top-to-bottom, creating an upside-down J.
NNAT Mirror Images and Rotations 2
A triangle points to the upper-right corner.
When reflected across a vertical line, where does the triangle point?