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find the length of AD and BC first

how im i supposed to do that @mathmath333

|dw:1440709546470:dw|
use pythagorus for AD

ok

nevermind

do you remember how to find the slope between
(0,4) and (5,6) ?

i have to subtract 4 and 6

then subtract 0 and 5 and divided???

yes. the side AB has slope 2/5
the opposite side is CD
find the slope between points C and D

5/2

you should get 2/5 . remember it is change in y divided by change in x
(6,2)
(1,0)

ooo ok

do i do the same for number 74

slope for AD is 1/4

close but not 1/4 . also notice it should be negative (the line slopes down)

1/-4

show your work

what is change in y?
what is change in x ?

-1/4

0,4 1,0 0 minus 1 is -1
4 minus 0 is 4

ok, and which is change in y

finally show line BD has slope -4

for Q74, show line LM has slope m and line MN has slope -1/m (flipped and negated)

thx