(4,5)(2,1)
slope = (1 - 5) / (2 - 4) = -4/-2 = 2

(-2,3)(-4,4)
slope = (4 - 3) / (-4 - (-2) = 1/(-4 + 2) = -1/2

2 and -1/2 are negative reciprocals of each other....therefore, ur lines are perpendicular <==

5 0

3 years ago

the hypotenuse of a right triangle is 3 cm and one of the legs is 1 cm what is the length of the other leg ?

Afina-wow [57]

Answer:

2 $\sqrt{2}$

Step-by-step explanation:

let the other leg be x

Using Pythagoras' identity

The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is

x² + 1² = 3²

x² + 1 = 9 ( subtract 1 from both sides )

x² = 8 ( take the square root of both sides )

x = $\sqrt{8}$

= $\sqrt{4(2)}$

= $\sqrt{4}$ × $\sqrt{2}$ = 2 $\sqrt{2}$ ← exact value

4 0

3 years ago