Posted by Garcelyn on Tuesday, August 29, 2006 at 5:53pm.
I need help with these:
Triangle LMN has vertices L(6,5), M(4,3), N(2,4). Find the coordinates of the vertices of its image after it is reflected over the xaxis and then translated by (3,0)
a. L(9,5), M(7,3), N(5,4)
b. L(6,5), M(4,3), N(2,4)
c. L(5,6), M(7,3), N(2,4)
d. L(9,5), M(4,3), N(5,4)
The vertices of triangle FGH are F(1,1), G(3,5), H(6,0). Find the coordinates of the vertices after a reflection over the yaxis.
a. J(0,0), K(1,3), L(7,8)
b. J(0,0(, K(1,3), L(7,8)
c. J(0,0), K(3,1), L(8,7)
d. J(0,0), K(3,1), L(8,7)
For the first part, a reflection over the xaxis involves mutliplying the y coord's by 1. Thus
L(6,5)> (6,5), M(4,3)>(4,3), N(2,4)>(2,4). A translation involves adding (3,0) to each of these points. Thus L(6,5)>(6,5)+(3,0)=(9,5). You should be able to finish the others.
For the second one we reflect across the yaxis. This time we negate the x coord's. Thus F(1,1)>(1,1).
It appears you're missing some kind of translation here. Was it supposed to be translated by (1,1)? Or is it supposed to be reflected across the origin or some other point or line?
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Help with triangle  Anonymous, Wednesday, February 1, 2017 at 5:12pm
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