– 5:
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?
Show solutionHide solution
Answer 1 – 5:
1. Kids have to do as directed.
2. There are 4 corners in the paper.
3. (a) Now, there are 5 corners in the paper.
(b) (i) 6 corners
(ii) 7 corners
(iii) 8 corners
(c) Yes, the paper can be folded in such a way that it has only three corners, using 2 folds. We will get a triangle.
4. Kids have to do as directed.
5. Yes, the corners of the square can be folded in such a way that the number of corners remains unchanged, i.e. 4.
Question:
Look at the following table and tick the names of things that have corners. Also count the number of edges and corners in each of them.
| Name of thing | Whether it has corners | Number of edges | Number of corners |
| Die | Yes | 12 | 8 |
| Ball | No | 0 | 0 |
| Eraser | Yes | 12 | 8 |
| Egg | No | 0 | 0 |
| Sheet of paper | Yes | 4 | 4 |
Question:
In the following figures, tick ( ) those which have corners. Do these figures have curved lines?
Yes, these figures have curved line also.
Question:
Using only straight lines, can you draw a figure which has no corners?
No, we can’t draw a figure which has no corners.