Prove that if (a, b) and (c, d) are two distinct points, the line joining them is perpendicular to the line joining (b, c) and (d, a)

First, find the slopes of each line. This is (b-d)/(a-c) and (b-s)/(c-a). Since the product is -1, they are perpendicular.

here you hope this .

step-by-step explanation:

hypotenuse = √(15² + 8²)

=  √(225 +64)

=  √(289) = 17

sin(x) = cos(y) = 8/17

they are identical so long as you are doing the sine of one angle and the cosine of the only other angle that isn't the right angle.

the correct answer is 1: 2

step-by-step explanation:

hope this your welcome : )