Question

WILL GIVE MEDAL
find the value of x

A.
2
B.
4
C.
6
D.
8
http://media.education2020.com/evresources/2004-04-01-02-00_files/i0400000.jpg

Answer 1

use the pythagoras theorem

( sqrt20)2 = x^2 + (x-2)^2

solve for x

Answer 2

what does the sqrt20 squared come to ?

Answer 3

4.4721

Answer 4

?

Answer 5

that's the sqrt20
(sqrt20)^2 = sqrt20 * sqrt20

Answer 6

suppose we have the sqrt4 and we square it what do we get?

Answer 7

sqrt 20 is , by definition, a number which when squared gives 20