This channel makes me realize just how much math I've forgotten how to do. I once got a final grade of 102% in my college physics class. Now I'm here at 33 years old completely lost in all but the most basic of basic equations
At the title card, my answer is b) ▲. We're reflecting it _across_ the Y (vertical ) axis, so the coordinates for each point will be the same in Y, but will be the negative value in the X (horizontal) axis. We're not rotating, so it can't be a or d, and we're not reflecting across x, so that leaves out c.
The loci of the three vertices of the triangle are A(x1,y1), B(x2y2), and C(x3,y3) (Note that all of the x values are negative in this triangle). The loci of the "Reflect" triangle will be A(-x1, y1), B(-x2, y2) and C(-x3, y3). So all the y values are the same in the second triangle and will therefore be located the same distance above the X line. But the x values are negatives of the originals so they will be located the same distance from the Y line but on the other side of it. Normally, positives are above the X axis and to the right of the Y axis,
Reflected through the Y axis, the triangle would still be the same way up. A 'mirrow image' .. but still pointing upwards .. so the answer is b). It's the X axis that would turn it upside down.
Got it.
Mirror image to the right, crossing 'y'.
Thanks for the fun.
This channel makes me realize just how much math I've forgotten how to do. I once got a final grade of 102% in my college physics class. Now I'm here at 33 years old completely lost in all but the most basic of basic equations
I’m older than you took 12hrs physics 16hrs chem, can’t remember squat
At the title card, my answer is b) ▲.
We're reflecting it _across_ the Y (vertical ) axis, so the coordinates for each point will be the same in Y, but will be the negative value in the X (horizontal) axis.
We're not rotating, so it can't be a or d, and we're not reflecting across x, so that leaves out c.
I just held up a mirror and it looked the same, so b) My final answer.
Thank you for all your hard work I love your program as myself have had very little math skills growing up but I will keep plugging on
The loci of the three vertices of the triangle are A(x1,y1), B(x2y2), and C(x3,y3) (Note that all of the x values are negative in this triangle). The loci of the "Reflect" triangle will be A(-x1, y1), B(-x2, y2) and C(-x3, y3). So all the y values are the same in the second triangle and will therefore be located the same distance above the X line. But the x values are negatives of the originals so they will be located the same distance from the Y line but on the other side of it. Normally, positives are above the X axis and to the right of the Y axis,
Along the y axis: b
Answer: b) ^
(pointing up, same as start)
I'm waiting for MMM to present us with a Sudoku puzzle one of these days. Maybe on April 1st.
Reflected through the Y axis, the triangle would still be the same way up.
A 'mirrow image' .. but still pointing upwards .. so the answer is b).
It's the X axis that would turn it upside down.
Why were quadrants not mentioned?
i actually took reflexive geometry in high school. about 80 million years ago.
If you mirror with the X axis you get c. :)
Would have been better if you had used a non symmetrical shape ?
Well, you need axes in the choices, otherwise you don't know if b) is a true reflection or not.
Yea I finally got one right
Don’t complicate my victory
C IS THE RIGHT ONE
B
B.
Here I am wrong again
b
b∆
First
B
B