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Use only triangles - Mathematics

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Use only triangles

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Solution

shaalaa.com
Shapes and Designs
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Chapter 5: Shapes and Designs - The 7–piece tangram [Page 68]

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NCERT Math - Magic [English] Class 3
Chapter 5 Shapes and Designs
The 7–piece tangram | Q i) | Page 68

RELATED QUESTIONS

Colour the clown following the directions given below :

Triangles

Squares

Rectangles

Circles  


How many triangles are there in the following figures?


Looking at the picture given above, can you tell who is out?


  1. Take a rectangular sheet of paper.
  2. Count its corners.
  3. Now fold one of its corners.
    a) How many corners does it have now?
    b) How many corners will you get by folding
    i) 2 corners
    ii) 3 corners
    iii) 4 corners
    c) Can you fold this paper in such a way that it has only three corners? You are allowed only two folds.
    What shape will you get?
  4. Repeat the activity with a square sheet of paper.
  5. Can you fold all the corners of the square sheet in such a way that the number of corners remains unchanged?

Using only straight lines, can you draw a figure which has no corners?


Find matching sides among the following pairs of pieces.

  1. Pieces 1 and 2
  2. Pieces 2 and 4
  3. Pieces 1 and 5
  4. Pieces 2 and 5


Use pieces 1, 2, 3 and 5


Are the shapes made of

  1. Curved lines
  2. Straight lines
  3. Both curved and straight lines.

Among the following, can you match the tiles with the designs that they will make on the floor? Draw lines to match.


Franke and Juhi's mummy has hidden a surprise gift for both of them. But she wants them to find out through a treasure hunt. She has written some instructions here. Can you help Juhi and Franke in finding their gift?

  1. Start from the tallest tree.
  2. Go forward on the pathway.
  3. From the sixth tile, turn left.
  4. After moving a few steps again you will find a plant on your right hand side.
  5. Colour the dress of the child playing closest to this plant.
  6. Start moving again from the plant.
  7. On the fourth tile, turn left again.
  8. On the way, you will find the corner of the fourth tile is broken.
  9. You will find a bat and a ball lying on the ground. Don't pick them up, just circle them.
  10. Move ahead and turn right.
  11. You will find a mango tree. A few mangoes can be seen on the tree. Colour 11 mangoes on the tree.
  12. Also draw some grass near the mango tree and start moving again on the pathway.
  13. When you go straight, you will find a house. 
  14. Behind that house there is a bag. Open it and you will find something sweet in it! Can you tell what their mother has kept in the bag?


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