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Welcome to Openstudy! please state your question?
thanks. Triangle PQR is transformed to triangle P'Q'R'. Triangle PQR has vertices P(3, −6), Q(0, 9), and R(−3, 0). Triangle P'Q'R' has vertices P'(1, −2), Q'(0, 3), and R'(−1, 0). 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)
I will be right back, i need to finish helping another student.
This link are shortcuts to reflections and rotations. Memorize them, and it will make reflections and rotations much simpler. http://www.regentsprep.org/regents/math/geometry/gt5/RuleSheet.pdf
just remember ALL rotations are counterclockwise unless said otherwise, so do not get confused.
For the first one, it will make it easier if you graphed it using a online calculator or something.
I prefer desmos but mathway is fine too.
yes, use Mathway.
Sorry, unfortunately i have to go. Hopefully somebody else can successfully explain it all to you. :)
P(3, -6) P'(1, -2) what are we doing to each coordinate to go from P to P' ?
solve for k 3k = 1 -6k = -2
k = 1/3 works as well
k = 1/3 means that you are multiplying each coordinate by 1/3 or dividing each coordinate by 3
do you see how that works?