Question

the bottom of a ladder must be placed 3 feet from a wall. the ladder is 12 feet long. how far above the ground does the ladder touch the wall?

Answer 1

11.5

Explanation:

`\sqrt{12^(2) -3^(2) }` = 11.61895004 rounding it is 11.5
`a^(2) +b^(2) =c^(2)`

The reason for subtracting is because we have the hypotenuse but we are looking for b so we subtract if we were looking for the hypotenuse ( c ) then we would be adding instead I used square root because its way faster :)

Answer 2

Use the formula a squared plus b squared =csquared in this case you will come out with an equation like this 3sqaured + bsqaured =12squared 9+bsqaured =144 144-9= b= 135 B=approximately 11.5