Test: Building With Bricks - 3 - Class 4 MCQ

Explanation:

Counting Triangles:

- Start by counting the smaller triangles within the figure.
- There are 4 small triangles in the center.
- Moving outwards, there are 4 triangles on each side.
- Finally, there is 4 large triangle encompassing all the smaller ones from square.

so a total of 12 triangles

The line of symmetry is the line which divides the figure into two equal halves. The color and shape of the halves should be same.
In the given figure, GH symmetrically divides the figure.

All are closed figures with different number of sides and a closed figure is called a polygon.

Perimeter of the given figure = 44 cm.

Only one square must be shaded to divide the figure into two equal parts.

                    
The squares formed are 12, 34, 56, 78, 2367 and 12345678 i.e., 6 in number.

We have,
AB + GH + CD = FE
⇒ 3 cm + GH + 6 cm = 12 cm
⇒ GH = 12 cm - 9 cm = 3 cm

Perimeter of a figure is the sum of all of its sides.
Perimeter of I=5+2+5+2= 14cm Perimeter of II = 2+2+2=6cm
Perimeter of III = 4+4+4+4=16cm Hence III has highest perimeter,

The line of symmetry is the line which divides the figure into two equal halves.
GH is the only line which symmetrically divides the figure.

In rectangle IJKL, we have
IJ = LM + MK (opposite sides are equal in a rectangle.) ⇒8=5+MK
∴ MK = 3 cm
In rectangle MNOP, we have
MP = NO ⇒ MK + KP = NO
⇒ 3 + KP = 12
⇒ KP = 9 cm.