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Basic Geometrical Ideas
1. Draw a rough sketch of a quadrilateral PQRS. Draw its diagonals. Name them. Is the meeting point of the diagonals in the interior or exterior of the quadrilateral?
The diagonals of the quadrilateral PQRS is PR and QS. The meeting point of the diagonals is in the interior of the quadrilateral.
2. Draw a rough sketch of a quadrilateral KLMN. State,
(a) two pairs of opposite sides,
(b) two pairs of opposite angles,
(c) two pairs of adjacent sides,
(d) two pairs of adjacent angles.
(a) (KL, MN) and (LM, KN) are the two pairs of opposite sides.
(b) KLM, MNK and NKL, LMN are the two pairs of opposite angles.
(c) (KL, LM) and (KN, NM) are the two pairs of adjacent sides.
(d) LMN, MNK and KLM, LMN are the two pairs of adjacent angles.
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