Page 114 - ICSE Math 4
P. 114

A      C
                                                                                                  B
                                                              A           B                          D
                                                                                       A

                                                              C           D               C
                                       B     D              Horizontal parallel
                                                                  lines                 Slan  ng parallel
                                    Ver  cal parallel
                                                                                             lines
                                         lines
                                                                                      X                 Y
                    Lines XY and ST are not parallel because when
                                                                                                         T
                    extended, they meet at a point.
                                                                                        S


                              Exercise 9.3




                      1.  For each of the following objects, name the pairs of all parallel lines.

                           (a)  A             B        (b)       A                       B     (c)    A
                                                                                                              B
                                      D              C                                           D
                                                               E                         F
                                                                   D                         C         C
                                 E             F


                                       H            G
                      2.  Look at the given fi gure and choose the correct op  on in each part to answer the
                           ques  ons. Give reasons to jus  fy your answer.
                                                                                            E               I     K
                           (a)  __________ is parallel to KL.                                    G
                                                                                      A     O                        B
                                 (i)  GH             (ii) IJ           (iii) EF
                                                                                       H
                                                                                                  C       J          D
                           (b)  EF and AB intersect at __________.                          F                  L

                                 (i) O                  (ii) G               (iii) H
                            (c)  __________ is perpendicular to EF.

                                 (i) GH                 (ii) AB              (iii) KL

                           (d)  __________ and  __________ are two pairs of parallel lines.

                                 (i)  AB and CD, EF and KL                    (ii)  EF and KL; KL and IJ
                                (iii)  KL and IJ; AB and CD

                           (e)  __________  and __________  are perpendicular to KL.

                                 (i)  IJ and CD         (ii)  AB and CD      (iii)  AB and IJ

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