Question

Triangle PQR is transformed to triangle P'Q'R'. Triangle PQR has vertices P(8, 0), Q(6, 2), and R(−2, −4). Triangle P'Q'R' has vertices P'(4, 0), Q'(3, 1), and R'(−1, −2).

Plot triangles PQR and P'Q'R' on your own coordinate grid.

Part A: What is the scale factor of the dilation that transforms triangle PQR to triangle P'Q'R'? Explain your answer. (4 points)

Part B: Write the coordinates of triangle P"Q"R" obtained after P'Q'R' is reflected about the y-axis. (4 points)

Part C: Are the two triangles PQR and P''Q''R'' congruent? Explain your answer. (2 points)

Answer 1

@mathmate ??

Answer 2

@volleyballlover55
Have you plotted the preimage and preimage on a grid, or on you calculator?

Answer 3

no

Answer 4

i need help starting from the very beginning :)

Answer 5

That's the first step you need to do if they give you the coordinates of the shapes, before and after transformation.
Do you use Desmos? It's a nice tool for plotting.

Answer 6

no..

Answer 7

Try it when you have time,
https://www.desmos.com/calculator
It will make many of your graphics problems so much easier.

Answer 8

ok so whats the first step to this question.. :)

Answer 9

Plotting is the first step of the question.

Answer 10

I'd like you to put on the drawing the image, P'Q'R'.
You don't have to be exactly to scale, because there's none.
You just have to estimate what you see, for example, 4 is half of 8, so you put it half way to 8, etc.

Answer 11

@volleyballlover55
Are you still there?

Answer 12

yes!

Answer 13

Hope you're working on the plot.
Geometry without drawing a diagram will make it 10 times more difficult.

Answer 14

ok... give me a sec.. wait but i dont know how to do that :(

Answer 15

im so confused.. i dont know what any of this means

Answer 16

Go to my drawing, find the pencil on the top right, click on it.
On the drawing, use the pencil tool, draw crosses or circles where you think P', Q', R' should be.
That's it.

Answer 17

Remember to use the coordinates given to you in the question.

Answer 18

um ok ill try but i doubt im going to do it right :(

Answer 19

Does not matter, we'll look at it together. Give it a try.