In water image transformation, a right-pointing arrow '→' becomes:
Answer: A
Water image (horizontal reflection) reverses left-right orientation. A right-pointing arrow becomes left-pointing arrow.
Q.62Hard
The mirror image of a shape shows that point P at distance 4cm from the mirror is now 8cm from point P'. This demonstrates which principle?
Answer: D
All these principles demonstrate that in mirror reflection, the mirror acts as a perpendicular bisector with equal distances on both sides.
Q.63Medium
A parallelogram with sides 6cm and 8cm is reflected in a vertical mirror. What will be the dimensions of the mirror image?
Answer: B
Mirror reflection preserves dimensions. The sides remain 6cm and 8cm, only the orientation may change.
Q.64Easy
Which digit from 0-9 looks identical to its mirror image when reflected in a vertical mirror?
Answer: A
Digits 0, 1, and 8 have vertical line symmetry and appear identical in a vertical mirror reflection.
Q.65Hard
In a combined mirror and water image transformation, if a point is first reflected vertically then horizontally, it undergoes a rotation of:
Answer: B
Vertical mirror reflection followed by horizontal water image reflection results in 180° rotation about the point of intersection of the two mirrors.
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Q.66Medium
The word 'INDIA' when subjected to water image transformation becomes:
Answer: A
Water image (horizontal reflection) reverses the sequence. 'INDIA' becomes 'AIDNI' with letters in reverse order.
Q.67Medium
A triangle ABC with angle A = 90°, angle B = 60° is reflected in a vertical mirror. The angles in the mirror image will be:
Answer: D
Mirror reflection preserves angles. The angles remain 90°, 60°, 30° in the same measures, though vertex positions may change.
Q.68Medium
If the mirror image of a number shows '69', what was the original number?
Answer: B
When reflected vertically, 6 becomes 9 and 9 becomes 6. The order also reverses in water image, so '69' in mirror comes from '96' originally.
Q.69Easy
A regular pentagon is reflected in a horizontal mirror. How many sides will the water image have?
Answer: C
Mirror reflection preserves the number of sides and shape properties. A pentagon remains a pentagon with 5 sides.
Q.70Easy
In a mirror image problem, if the original figure has area 50 cm², the mirror image will have area:
Answer: B
Mirror and water reflections preserve area. The image area equals the original area.
Q.71Medium
A figure shows vertices A(1,1), B(4,1), C(4,4), D(1,4). After water image transformation about x-axis, vertex C will be at:
Answer: A
Water image about x-axis changes (x,y) to (x,-y). Therefore C(4,4) becomes (4,-4).
Q.72Hard
Which capital letter from the English alphabet requires the LEAST number of strokes to draw its mirror image identically?
Answer: C
Letter 'I' is a single vertical line and has complete vertical symmetry, requiring no additional strokes for mirror image.
Q.73Hard
A digital clock displays 12:21. Its mirror image (vertical reflection) would show:
Answer: C
In digital mirror image, the numerals are individually reflected and positions adjusted. 12:21 becomes 12:51 considering digit transformations.
Q.74Hard
A shape undergoes both mirror reflection (vertical) and water image (horizontal). If a point moves from position (3,4) to (3,-4) after both transformations, which transformation happened first?
Answer: C
Both transformations applied result in the same final position regardless of order due to the properties of perpendicular reflections.
Q.75Medium
When the word 'COMPETITIVE' is reflected in a vertical mirror, how many letters remain unchanged in their appearance?
Answer: B
Letters that remain unchanged in vertical mirror reflection are: A, H, I, M, O, T, U, V, W, X, Y. In 'COMPETITIVE', only T, I, T, I appear = 4 letters remain visually same.
Q.76Medium
A digital clock shows 15:47. What will be its mirror image (vertical reflection)?
Answer: A
In vertical mirror reflection, digits are reversed and each digit is horizontally flipped. 15:47 becomes 74:51 when reflected vertically.
Q.77Easy
Which of the following words appears exactly the same in both mirror and water image?
Answer: C
CIVIC is palindromic and symmetric both horizontally and vertically, so it appears identical in mirror image and water image.
Q.78Medium
A square with vertices at (0,0), (4,0), (4,4), (0,4) is reflected across a vertical line x=2. What are the new coordinates of the vertex originally at (4,4)?
Answer: A
When reflecting across x=2, the point (4,4) moves to (0,4). The distance from (4,4) to the line x=2 is 2 units, so the reflected point is 2 units on the opposite side at (0,4).
Q.79Easy
If the mirror image of a number reads as '2002', what was the original number?
Answer: A
2002 is a palindromic number that reads the same when mirrored. Each digit (2,0,0,2) appears identical in vertical mirror reflection.
Q.80Easy
A right-angled triangle with legs of length 3 and 4 units is reflected in a horizontal mirror line. What happens to its area?
Answer: B
Mirror reflection is an isometric transformation that preserves distances and areas. The reflected triangle has the same dimensions and area = 6 square units.
