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DIRECTIONS for the question:
Solve the following question and mark the best possible option.
Which of the following statements is definitely true?
  • a)
    All the angles of parallelogram can be acute
  • b)
    If the diagonals of a quadrilateral are at right angles, it is a rhombus
  • c)
    If the diagonals of a quadrilateral are at right angles, the figure formed by joining the mid points of adjacent sides is a rectangle
  • d)
    None of these
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
DIRECTIONS for the question: Solve the following question and mark the...
If all the angles in a parallelogram are acute, their sum cannot be 360°. So option 1 is false.
Option 2 is not necessarily true as the diagonals of a kite are also perpendicular to each other. Consider option 3.
Each diagonal of a quadrilateral divides it into 2 triangles. So, the lines joining the mid-points of the sides will be parallel to the diagonals and their lengths will be half the lengths of the corresponding diagonals. So, the figure formed will be a parallelogram.
Since the diagonals are perpendicular to each other, the sides of the parallelogram formed will be perpendicular to each other.
In other words, the parallelogram formed is a rectangle.
Thus option 3 is true.
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Most Upvoted Answer
DIRECTIONS for the question: Solve the following question and mark the...
Explanation:

To determine which statement is definitely true, let's analyze each option one by one.

a) All the angles of parallelogram can be acute:
This statement is not definitely true. A parallelogram can have acute angles, obtuse angles, or both. So, this option is incorrect.

b) If the diagonals of a quadrilateral are at right angles, it is a rhombus:
This statement is also not definitely true. While it is true that a rhombus has diagonals that are at right angles to each other, there are other quadrilaterals, such as a square, that also have diagonals at right angles. So, this option is incorrect.

c) If the diagonals of a quadrilateral are at right angles, the figure formed by joining the midpoints of adjacent sides is a rectangle:
This statement is definitely true. When the diagonals of a quadrilateral are at right angles, the figure formed by joining the midpoints of adjacent sides is always a rectangle. This is a known property of quadrilaterals. So, this option is correct.

d) None of these:
Since option c is definitely true, option d is incorrect.

Therefore, the correct answer is option c) If the diagonals of a quadrilateral are at right angles, the figure formed by joining the midpoints of adjacent sides is a rectangle.
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DIRECTIONS for the question: Solve the following question and mark the best possible option.Which of the following statements is definitely true?a)All the angles of parallelogram can be acuteb)If the diagonals of a quadrilateral are at right angles, it is a rhombusc)If the diagonals of a quadrilateral are at right angles, the figure formed by joining the mid points of adjacent sides is a rectangled)None of theseCorrect answer is option 'C'. Can you explain this answer?
Question Description
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