Question

Can someone help me figure this out without giving me the answer using process of elimination? :)
@iambatman @jim_thompson5910

A student performs two transformations on a figure on a coordinate plane. Which of the following series of transformations would NOT result in a congruent figure?

A. a translation of 2 units up and then a dilation of
B. a rotation of 90° around one point and then a reflection over the x-axis
C. a reflection over the y-axis and then a reflection over the line y = x
D. a translation of 9 units to the left and then a translation of 1 unit down

Answer 1

1/2 is at the end of A, sorry. :)

Answer 2

@iambatman @mathstudent55 @jim_thompson5910

Answer 3

hint: think back to the problem that you posted right before this one

Answer 4

C? 0_0 This one kinda confuses me.

Answer 5

If you were to reflect a triangle over a line, are the two triangles congruent?

Answer 6

Yes? Aren't they just a reflection of each other. They're still the same shape and size...

Answer 7

so C is out because we're looking for a transformation that would NOT result in a congruent figure

Answer 8

OK... @jim_thompson5910 I THINK it's A...

Answer 9

why A? what transformation do you see that makes it the answer?

Answer 10

Woops I meant B. :) @jim_thompson5910

Answer 11

ok, why B?

Answer 12

IDK! It might be A because It's the only one changing not turning.

Answer 13

do translations keep the same size and shape of the figure?

Answer 14

Yes? Don't they just move on the graph not change? o_o

Answer 15

yep, so translations result in a congruent figure

Answer 16

that's why D is out

Answer 17

rotations do the same, so B is out

Answer 18

dilations are one transformation that don't keep the shape the same

which is why I was giving you the hint to go back and look at the previous problem you posted

Answer 19

size and shape*

Answer 20

So it is A?!?!? ):):):):):):):):):):):) @jim_thompson5910

Answer 21

correct

Answer 22

Yay! Thanks! :)

Answer 23

you're welcome