Under which of the following transformations is ΔCAB the image of ΔQPR?

Question

anonymous · Answer

attachment

anonymous · Answer

a. reflection over the x-axis
b. rotation over the y-axis and ℓ1
c. reflection over the y-axis
d. rotation over the x-axis and ℓ1

anonymous · Answer

@rulnick

rulnick · Answer

A reflection across y would "mirror" through the y axis.  Is that how to make CAB starting with QPR?

anonymous · Answer

@rulnick no?

anonymous · Answer

wouldn't it be reflection of the x-axis?

rulnick · Answer

I think it would.  Notice the coordinates of the two triangles are alike, except the signs of the x coordinates have changed.  That's what happens with reflection across y.

chrisplusian · Answer

I agree with @rulnick. A reflection across the Y-axis    F(-x) means to multiply the x-coordinate by negative one

anonymous · Answer

What is the rotated image of segment PQ?

anonymous · Answer

@chrisplusian @rulnick

chrisplusian · Answer

I am not familiar with the terminology, what is the definition of rotate?

chrisplusian · Answer

I believe it would be segment AG

chrisplusian · Answer

http://www.mathsisfun.com/geometry/rotation.html

chrisplusian · Answer

@lana.831 does that make sense?

anonymous · Answer

@chrisplusian yeah so if i needed to rotate segment PR would it be AB?

chrisplusian · Answer

I am pretty sure because what I could find online said that you are just rotating it like in a circle. The only thing that makes sense is AG not AB. But I am just trying to reason this through with limited experience in "rotation"