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    E:\Working\Brother_Education\Preparatory_Stage_Maths-3_(11-09-2024)\Open_Files\CHAP_07
                 \ 02-Nov-2023                      Sonia Suyal   Proof-1                     Reader’s Sign _______________________ Date __________

                  Step 2: Mark two points, say P and Q,                   P        Q

                            against the marks 0 and 3 on the              0 cm  1  2  3  4  5  6  7  8  9  10  11  12  13  14  15
                            ruler.                                        0      1       2       3      4       5      6

                  Step 3: Holding the ruler firmly, join these
                            two points P and Q with a pencil.              P       Q
                            The line segment PQ thus drawn is              0 cm 1  2  3  4  5  6  7  8  9  10  11  12  13  14  15

                            the required line segment of 3 cm              0      1       2       3      4       5       6
                            in length.

                           practice time 7B

                  1.  Measure the given line segments using a ruler and fill in the blanks.

                       (a)  X                       Y                          XY   = ________ cm

                       (b)  P                             Q                   PQ = ________ cm

                       (c)  A                                   B              AB  = ________ cm

                       (d)  R                                              S   RS  = _________ cm
                  2.  Draw the following line segments using a ruler.

                       (a)  2 cm                (b)  7 cm                (c)  10 cm              (d)  11 cm

                  plane ShapeS

                  Any closed figure joining three or more points that can be drawn on a flat surface is called

                  a plane figure or shape. Triangles, rectangles, squares, etc., are plane shapes. These shapes
                  are also called 2-dimensional shapes because they have length and breadth.

                    triangle                        A                   rectangle                     A    Vertex       D

                      ABC is a triangle.                  Vertex         ABCD is a rectangle.
                                                                 Side
                      It has 3 sides:                                    It has 4 sides:
                      AB, BC and CA.                                       AB, BC, CD and DA
                                              B                    C                                  B      Side       C
                      It has 3 vertices:                                 It has 4 vertices:
                      A, B and C.                                          A, B, C and D.

                      A triangle is denoted by the symbol                The lengths of opposite sides
                      D. So, triangle ABC can be written as                of a rectangle are equal.

                      DABC.                                                Here, AB = CD and BC = AD.

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