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Question

How many quadrilaterals does the following figure have?

The correct answer is
19

To find the number of quadrilaterals in the given figure, we need to identify all possible combinations of four lines that form a closed shape. The image consists of overlapping squares, and we need to systematically count each possible quadrilateral.

Let's break it down:

  • Individual squares: Count each square as one quadrilateral. There are 5 small squares in the figure.
  • Rectangles made by combining squares:
    • 2 squares can form a rectangle: We can choose horizontally and vertically adjacent squares to form rectangles. There are 4 horizontal rectangles and 2 vertical rectangles.
    • 3 squares can form a larger rectangle horizontally and vertically. There are 4 possible rectangles.
  • Larger combinations:
    • Consider combinations involving more than three squares, keeping the structure of the figure in mind. Count combinations like two squares stacked vertically and horizontally overlapping with others.
    • Count overlapping combinations carefully to ensure no repeated counting occurs.

Let’s sum up the counted quadrilaterals:

  • 5 individual squares
  • 4 (2-square) horizontal rectangles
  • 2 (2-square) vertical rectangles
  • 4 (3-square) combinations
  • Total distinct quadrilaterals = 19

Therefore, the total number of quadrilaterals in the figure is 19.

Thus, the correct answer is 19.

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Important Questions from Counting Figure (Notes)

  1. Find the number of triangles in the given figure

  2. Find the number of triangles in the given figure.

  3. How many rectangles are there in the given figure?

  4. In the following question, select the figure which can be placed at the sign of question mark (?) from the given alternatives.

  5. In the following question, select the figure which can be placed at the sign of question mark (?) from the given alternatives.

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