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    My elder sister divided the watermelon into 16 parts. I ate7 out of them. My friend ate 4. How much did we eat between us? How much more of the watermelon did I eat than my friend? What portion of the watermelon remained?

I ate= My friend ate = we both eat the watermelon more I eat than my friend is  The portion of the watermelon remained

   Mother made a gud patti in a round shape. She divided it into 5 parts. Seema ate one piece from it. If I eat another piece then how much would be left?

Seema ate = I eat =  Total part eaten is              The left part would be

   Find the difference between \frac{7}{8} and \frac{3}{8} .

the difference between and  is given by

    Sohan was putting covers on his note books. He put one fourth of the covers on Monday. He put another one fourth on              Tuesday and the remaining on Wednesday. What fraction of the covers did he put on Wednesday?

He put covers on Monday= He put the cover on Tuesday = and the remaining on Wednesday. Thus, the fraction of the covers he put on Wednesday =                                                                                                                                                             

    Mother asked Neelu and her brother to pick stones from the wheat. Neelu picked one-fourth of the total stones in it and her brother also picked up one-fourth of the stones. What fraction of the stones did both pick up together?

. Neelu picked stones       brother picked up the stones The total fraction of the stones they both pick up together  of total stones.

   My mother divided an apple into 4 equal parts. She gave me two parts and my brother one part. How much apple did she give to both of us together?

mother gave to me  part mother gave to my brother   part She gave both off us    part

   Arrange the following in ascending and descending order :

            (c) Write 3 more similar examples and arrange them in ascending and descending order.

the following in ascending and descending order are: (i)  and  (ii)  and  (iii)  and                   

Q. 1.     Arrange the following in ascending and descending order :

            (b) \frac{3}{7},\frac{3}{11},\frac{3}{5},\frac{3}{2},\frac{3}{13},\frac{3}{4},\frac{3}{17}

the following in ascending and descending order are  :             (b)              

   Arrange the following in ascending and descending order :

            (a)  \frac{1}{12},\frac{1}{23},\frac{1}{5},\frac{1}{7},\frac{1}{50},\frac{1}{9},\frac{1}{17}

            (a)                    and   

     A triangular prism looks like the shape of a Kaleidoscope. It has triangles as its bases.

         Faces : _______

         Edges : _______

        Corners : _______

        

Faces =   (Two triangular faces and three square faces) Edges = 9     Corners =          

     A square pyramid has a square as its base.

         Faces : _______

         Edges : _______

         Corners : _______

         

In a square pyramid, the number of Faces =           (Four triangular faces and one square face) Edges =           (Four edges of the square base and other four joining at the top)    Corners = 

    A triangular pyramid has a triangle as its base. It is also known as a tetrahedron.

              Faces : _______

             Edges : _______

             Corners : _______

             

The number of Faces =           (All triangular faces) Edges =               Corners = 

     A cube is a cuboid whose edges are all of equal length.

           It has ______ faces.

          Each face has ______ edges.

          Each face has ______ vertices.

         

 It has  faces.        (Three pairs of parallel square faces)   Each face has  edges.          Each face has  vertices

    Using four unequal sticks, as you did in the above activity, see if you can form a quadrilateral such that

             (a) all the four angles are acute.

             (b) one of the angles is obtuse.

             (c) one of the angles is right angled.

             (d) two of the angles are obtuse.

             (e) two of the angles are right angled.

             (f) the diagonals are perpendicular to one another

(a) all the four angles are acute.             (b) one of the angles is obtuse.             (c) one of the angles is right angled.             (d) two of the angles are obtuse.               (e) two of the angles are right angled.               (f) the diagonals are perpendicular to one another

     Place a pair of unequal sticks such that they have their end points joined at one end. Now place another such pair meeting the             free ends of the first pair. What is the figure enclosed? It is a quadrilateral, like the one you see here. The sides of the                      quadrilateral are AB, BC , ___, ___. There are 4 angles for this quadrilateral. They are given by ∠BAD, ∠ADC, ∠DCB and _____.            BD is one diagonal. What is the other? Measure the length of the sides and the diagonals. Measure all the angles also.

            

The sides of the quadrilateral are AB, BC, CD, DA The angles are given by The other diagonal is AD.    

     Try to draw rough sketches of

            (a) a scalene acute angled triangle.

            (b) an obtuse angled isosceles triangle.

(a) a scalene acute angled triangle. :  Scalene : All side of different length Acute angled : All angles less than    (b) an obtuse angled isosceles triangle Isosceles traingle: Only two sides are of equal length Obtuse angled : At least one angle greater than 

    What does the angle made by the hour hand of the clock look like when it moves from 5 to 7. Is the angle moved more than 1                   right angle?

            

No, the angle is not more than than 1 right angle.  For each hour, angle made =  Therefore, when the hour hand moves from 5 to 7, the angle made = 

     The hour hand of a clock moves from 12 to 5. Is the revolution of the hour hand more than 1 right angle?

            

Yes, the revolution of the hour hand is more than 1 right angle. For each hour, angle made =  Therefore, when the hour hand moves from 12 to 5, the angle made = 

    Draw five other situations of one-fourth, half and three-fourth revolution on a clock.

              

(a) One fourth revolution: From (b) Half revolution: From (c) Three fourth revolution: From (d) Three fourth revolution: From (e) Half fourth revolution: From  

     What is the angle name for one-fourth revolution?

One-fourth revolution =  The angle name for one-fourth revolution is "Right Angle"
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