Question

Geometry Help! Please help!

Answer 1

Triangles DEF and D'E'F' are shown on the coordinate plane below:

Triangle DEF and triangle D prime E prime F prime with ordered pairs at D negative 1, 6, at E 1, 3, at F 6, 3, at D prime negative 6, negative 1, at E prime negative 3, 1, at F prime negative 3, 6.

What rotation was applied to triangle DEF to create triangle D'E'F'?

90° counterclockwise
90° clockwise
None of the above
180°

Answer 2

@uri @Rockiee @Nnesha

Answer 3

So my answer is 90 degrees clockwise. I need a double check on this because im not sure if its correct

Answer 4

do you know the formula of 90 degrees clockwise.

Answer 5

Yes its (x, y) -> (y, -x)

Answer 6

Right?

Answer 7

yesh right so now look at your EFD"" values are they going same way as formula

Answer 8

Yes

Answer 9

So the answer is 90 degrees clockwise?

Answer 10

ok so your E is ( 1 , 3) according to the formula
its suppose to be ( 3 ,-1) in order to be 90 clockwise now check what is E"

Answer 11

are you a math genius pico?

Answer 12

what is the process by which natural forces move weatherd rock downhill

Answer 13

mw1222 Ill help in a minute. Im doing my own work right now. Ok so yes E is at 1, 3

Answer 14

but that suppose to be ( 3 , -1)
because (x, y) -> (y, -x) right ???

Answer 15

RIGHT. Okay so then it is none of the above? because Its not 180 degrees and I dont think its 90 degrees counterclockwise.

Answer 16

do you know the formula of 90° counterclockwise and 180 one ??

Answer 17

Yes I know all of them

Answer 18

ok so tell me what is 90° counterclockwise ?? formula

Answer 19

counterclockwise is (x, y) (-y, x)

Answer 20

and 180 degrees is (x, y) -> (-y, -x)

Answer 21

help

Answer 22

ok so your E is ( 1 , 3)
what is E'

Answer 23

@mw1222 hey welcome to open study do not post question on other post
so do post your own queston

Answer 24

ummmm ok?

Answer 25

yesh thaku for being soooo nice :)

Answer 26

Ok so E' is 1?

Answer 27

only one ???

Answer 28

1, 3 lol my bad

Answer 29

E is ( 1 , 3)
not E'

Answer 30

ok so E prime is what then? 3, 1?

Answer 31

idk i have Ds IN MATH

Answer 32

ok so lets change ( 1 , 3) to counterclockwise is (x, y) (-y, x)
first do this

Answer 33

@mw1222 Go post your question! Ill help you later

Answer 34

@Nnesha ok

Answer 35

:)

Answer 36

Okay so using the counterclockwise formula (1, 3) would be ( -3, 1) ?

Answer 37

yesh right now look at your graph see what is E'

Answer 38

(-3, 1)

Answer 39

Ahhh. I probably seem so stupid!

Answer 40

nope you not so what is your answer

Answer 41

A. 90 degrees counterclockwise?

Answer 42

yesh now you can check F and D also

Answer 43

Okay :)

Answer 44

Alright looks to be correct! Thank you for being so patient with me and helping!

Answer 45

\(\color{green}{my :) pleasure }\)