- #1

Kolika28

- 146

- 28

## Homework Statement

A(-4,-4), B(4,-2) and D(-2,2)

a)

__Determine AB and AD vector__My answer: AB=[8,2] and AD=[2,6]

b)

*A point C is determined by DC being parallel to AB and the angle ABC = 90. Calculate the coordinates of C.*I found out that C=(46/17, 54/17)

c)

__Another point E has the coordinates (t, 2t-1) where t = R__

1) Find t so that point E is on line through C and D.1) Find t so that point E is on line through C and D.

I am not able to solve this one

## Homework Equations

ED=k*CD

ED=(-2-t, -2t+1)

But I always end up with two unknown variables k and t.

## The Attempt at a Solution

ED=[-2-t,-2t+1]

ED must be parallel with CD, therefore is

ED=k*CD=[(-80/17)k,(-20/17)k]

I don't know what to do next