Question

1. The square of side 12 cm is cut on the diagonal. Find the perimeter of one
triangle so formed
(2017)
(1) 24 12 cm (2) 122 cm (3) 10 (2+ 2) cm (4) 12 (2+ 2) cm​

Answer 1

Answer:

(3) 10(2+2) = 40 cm

Step-by-step explanation:

Since the square is cut along the diagonal, formula of diagonal of a square is

$\sqrt{2} \times a$

where 'a' is the side of the square.

So, length of diagonal of square is

$\sqrt{2} \times 12 \\ = 16.97 \: cm$

$\sqrt{2} = 1.414(approx)$

Now, Perimeter of one of the Triangle formed is

12+12+16.97

=40.97 cm,

which you can closely to approx as 40 cm(according to your given options)

So, option (3) is correct.