Asked by Tim
1. a triangle has vertices at (0,0), (2,1),(1,3). About which line could the triangle be resolved, in order to form one cone?
A) the line at x=2y
B) the line at y=3x
C) the x-axis
D) the y-axis
Could someone please explain how to do this? Thank you.
A) the line at x=2y
B) the line at y=3x
C) the x-axis
D) the y-axis
Could someone please explain how to do this? Thank you.
Answers
Answered by
Steve
Find which two sides are perpendicular.
Rotate the triangle about one of those sides.
Rotate the triangle about one of those sides.
Answered by
Tim
I tested out the theories A and B. None of them worked. So what does is mean by the x-axis and the y-axis? What does that mean?
Answered by
Steve
Should show your work. Let the points (0,0), (2,1),(1,3) be A,B,C
AB has slope 1/2
AC has slope 3
BC has slope -2
So, AB and BC are perpendicular.
So, rotate the triangle about AB or BC
AB is the line y = 1/2 x or x=2y
BC is the line y = -2x+5
So, A is the correct answer.
Check that against your calculations. You might also try actually plotting the points!
AB has slope 1/2
AC has slope 3
BC has slope -2
So, AB and BC are perpendicular.
So, rotate the triangle about AB or BC
AB is the line y = 1/2 x or x=2y
BC is the line y = -2x+5
So, A is the correct answer.
Check that against your calculations. You might also try actually plotting the points!
Answered by
Anonymous
Oh ok! Thank you
There are no AI answers yet. The ability to request AI answers is coming soon!