NCERT Exemplar Solutions
Class 6 - Mathematics - Unit 9: Symmetry and Practical Geometry - Fill in the Blanks
Question 19

Question. 19

The number of lines of symmetry in a picture of Taj Mahal is ____.

Answer:

one.

Detailed Answer with Explanation:

  1. What is a line of symmetry?
    A line of symmetry divides a figure into two exact mirror halves. If you fold the picture on this line, both sides match.
  2. Look at the Taj Mahal picture (front view).
    The building has the big dome in the center, a doorway in the middle, and similar small domes/minarets on the left and right.
  3. Try a vertical fold test.
    Imagine a straight line going up and down through the center of the main dome and doorway. If you fold the picture along this vertical line, the left side overlaps the right side.
  4. Check a horizontal fold.
    A line going left to right (through the middle horizontally) does not make mirror halves because the top (domes/sky) and bottom (base/ground/water) are different.
  5. Check diagonal folds.
    Diagonal lines also do not create mirror halves—the features won’t match exactly.
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NCERT Exemplar Solutions Class 6 – Mathematics – Unit 9: Symmetry and Practical Geometry – Fill in the Blanks | Detailed Answers