Question

Triangles DEF and D'E'F' are shown on the coordinate plane below:

What rotation was applied to triangle DEF to create triangle D'E'F'?

a. 90° clockwise
b. 180°
c. None of the above
d. 90° counterclockwise

Answer 1

B

Answer 2

180

Answer 3

for point f(6,3)\[\left[\begin{matrix}-1 & 0 \\ 0 & -1\end{matrix}\right]\left(\begin{matrix}6 \\ 3\end{matrix}\right)=\left(\begin{matrix}-6 \\ -3\end{matrix}\right)\] ...for point D(-1,6)\[\left[\begin{matrix}-1 & 0 \\ 0 & -1\end{matrix}\right]\left(\begin{matrix}-1 \\ 6\end{matrix}\right)=\left(\begin{matrix}1 \\ -6\end{matrix}\right)\]...for point E(1,3)\[\left[\begin{matrix}-1 & 0 \\ 0 & -1\end{matrix}\right]\left(\begin{matrix}1 \\ 3\end{matrix}\right)=\left(\begin{matrix}-1 \\ -3\end{matrix}\right)\]...........180 degree rotation

Answer 4

hey I said it first

Answer 5

i know @Gunboss i just added the proof/explanation for y its that...........

Answer 6

Ok cool

Answer 7

can you