Haryana State Board HBSE 6th Class Maths Solutions Chapter 4 Basic Geometrical Ideas Ex 4.5 Textbook Exercise Questions and Answers.
Haryana Board 6th Class Maths Solutions Chapter 4 Basic Geometrical Ideas Exercise 4.5
Question 1.
Draw a rough sketch of a quadri-lateral PQRS. Draw its diagonals. Name them. Is the meeting point of the diagonals in the interior or exterior of the quadrilateral ?
Solution:
Two diagonals are PR and QS. The meeting point of the diagonals is in the interior of the quadrilateral.
Question 2.
Draw a rough sketch of a quadri-lateral KLMN. State :
(i) two pairs of opposite sides.
(ii) two pairs of opposite angles.
(Hi) two pairs of adjacent sides.
(iv) two pairs of adjacent angles.
Solution:
(i) Two pairs of opposite sides are : KL, MN and LM, KN. .
(ii) Two pairs of opposite angles are : ∠K, ∠M and ∠L, ∠N.
(iii) Two pairs of adjacent sides are : KL, LM and LM, MN.
(iv) Two pairs of adjacent angles are: ∠K, ∠L and ∠L, ∠M.
Question 3.
Investigate: Use strips and fasten to make a triangle and a quadri-lateral. Try to push inward at any one vertex of the triangle. Do the same to the quadrilateral. Is the triangle dis-torted ? Is the quadrilateral distorted ? Is the triangle rigid ? Why is it that structures like electric towers make use of triangular shapes and not quadri-laterals ?
Solution:
No, triangle is not distorted. Yes, quadrilateral is distorted. Yes, the triangle is rigid. Because triangular shape is not affected.