Drawing shapes || Class - 4 || Unit - 5 || Mathematics || Whiteboardweb

 

 

 

 

 

 

 

 

1 .The large triangle has all sides 12 cm long.What is the perimeter ?

 

 

 

 

12+ 12+ 12 = 36 cm

 

 

The points at the middle of its sides are marked and joined to make a new triangle?

 

 

What is the length of each side of this triangle?

 6 cm

 

 

 

 

 Perimeter ?

 

 6 + 6 + 6 = 18 cm

 

The midpoints of the sides of the second triangle are marked and joined to make yet another triangle.

 

What is the length of each side of this triangle?

3 cm

Perimeter : 3 + 3 + 3 = 9 cm

Square

 

How many squares?

 

 

7 squares

 

 

Triangle

 

 

 Draw the next figure

 

 

How many triangles in it ?

 

 

16   (1+3+5+7)

 

 

Activity

 

 

Perimeter

What is the perimeter of a square of side 10 centimetres?

This square is cut through the middle to make two rectangles,What is the perimeter of each rectangle?