Question

A triangle has coordinates A (1, 5), B (-2, 1) and C (0, -4). What are the new coordinates if the triangle is rotated 90° clockwise around the origin?

Answer 1

(x,y) ---> (-y, x)

So, take the coordinates and apply this rule & there's your answer! (=

Answer 2

Rules Of Rotation:
90 degrees counterclockwise

(-y, x)
90 degrees clockwise

(y, -x)
180 degrees counterclockwise and clockwise

(-x,-y)

Answer 3

Still lost..

Answer 4

Okay, I'll do the first one.
A.(1,5)
So, according to the rules, rotated at a 90 degree clockwise the new coordinate would be (-5,1)

Answer 5

OH! So b would be -1, 2 or?

Answer 6

(x,y) turns into (-y,x) so, take the y axis and make it negative. and the x-axis goes in the place of the y-axis

Answer 7

Yes! But don't forget to carry over the negative!

Answer 8

So -2 would remain -2?

Answer 9

Yes. The only thing that changes is the y-axis

Answer 10

And C would be (-4,0)?

Answer 11

Close, but a negative plus a negative is a positive. So it'd be (4,0)
You've got the hang of it, just watch your signs.

Answer 12

Makes sense, thanks!

Answer 13

No problem!