Question

Can anyone help me solve this.I need proper equation..Thanks​

Answer 1

Answer: ?=9

√2

Explanation:

x=9 =a side of squre

y=diagonal

use equation :

y=a√2

y=9√2

y=12.69

Answer 2

y = 9
`√(2)`

Explanation:

Using the sine ratio in the right triangle and the exact value

sin45° =
`(1)/(√(2) )`

sin45° =
`(opposite)/(hypotenuse)` =
`(9)/(y)`

Multiply both sides by y

y × sin45° = 9, that is

y ×
`(1)/(√(2) )` = 9

Multiply both sides by
`√(2)`

y = 9
`√(2)`