CBSE Book Class 5 Maths Activity 1

To make a set of Tangram cutouts by paper folding and cutting and to make geometric figures using its pieces.

Learning objective :To familiarise with geometrical figures.

Pre-requisite :The knowledge of basic geometrical shapes : triangle, square, rectangle.

Materials required :An 8x8 grid, a pair of scissors, a pen/pencil and a ruler.

Procedure :1(a) To make a Tangram set.

Step 1.Take a 8x8 grid and label it as ABCD, which is a square.[Fig. 1(a)]

Step 2.Fold the square ABCD along BD such that point 'C' falls on point 'A' and mark the crease BD.

Step 3.Unfold the grid and cut along the crease.

Step 4.Take any one cutout obtained in Step 3 say ABD and fold it through the vertex A so that the two end points of the longest side meet exactly and mark the crease.

Step 5.Unfold and cut along the crease and label the two parts as 1 & 2 [Fig. 1(b)].

Step 6.Take the other cutout obtained in Step 3 and fold it in such a way that point containing a right angle exactly falls on the mid point of its longest side.

Step 7.Unfold and cut along the crease formed. Label the triangle cutouts as 3 [Fig. 1(c)].

Step 8.Take the remaining cutout obtained in Step 6 and fold along the lines drawn. [Fig.1(d).]

Step 9.Unfold and cut along the creases. Label the cutouts as 4, 5, 6 & 7. [Fig. 1(e).]

Please refer to the link below - CBSE Class 5 Maths Activity 1