Question

riangle ABC has been rotated 90° to create triangle DEF. Using the image below, prove that perpendicular lines have opposite and reciprocal slopes. You must show all of your work to receive credit.

Answer 1

dang um

Answer 2

I hate Geometry.....

Answer 3

me too

Answer 4

Get the slope of EF and the slope of BC. Multiply the 2 together, and if you get -1, then they're perpendicular.

Answer 5

Thanks so much!

Answer 6

did you get your answer?

Answer 7

Working on that. Give me one moment please! :)

Answer 8

ok:)

Answer 9

From my calculations, the slope of EF is about -0.75 and the slope of BC is about 1.33...

Answer 10

sounds right

Answer 11

That makes -0.9975. So they do have reciprocal slopes?