Question

The length of a diagonal square is 7 mm. Find the area of the square.
A)24.5
B)29.08
C)21.2
D)22.1

Answer 1

Since we have two 45-45-90 triangles, the length of one side will be \(7 \div \sqrt{2}\)

Answer 2

I DONT HAVE A SCIENTIFIC CALCULATOR ):

Answer 3

@zooo : HELP ?

Answer 4

You can rationalize it

Answer 5

\( \color{Black}{\Rightarrow \Large {7 \over \sqrt{2}} = {7\sqrt{2} \over 2} }\)

Now just square it :)

Answer 6

WHATS THE SQUARE ROOT OF 2 ?