Question

please solve this question only 2to 4

Answer 1

In 2nd Question :

It is given that there is a Regular Dragon which means it have 10 equal sides.

Side = r

So, Perimeter
$= r + r + r + r + r + r + r + r + r + r \: \\ or \: 10 \times r = 10r$
In the Third Question :

Equal Side = y cm
Unequal Side = x cm

Perimeter
$= y + y + x \\ = 2y + x$
In the Fourth Question :

Edge = a cm

Total Length of edges
$a + a + a + a + a + a + a + a + a + a + a + a = 12a \: cm \\ or \: 12 \times a \: = 12a \: cm$