S is the midpoint of RT. R has coordinates (-6, -1), and S has coordinates (-1, 1) . What are the coordinates of T? thank you sooo much :]]?
1 Answer
May 21, 2018
Explanation:
#"one way is to use vectors"#
#"since S is the midpoint of RT then"#
#vec(RS)=vec(ST)#
#rArruls-ulr=ult-uls#
#rArrult=2uls-ulr#
#color(white)(rArrult)=2((-1),(1))-((-6),(-1))#
#color(white)(rArrult)=((-2),(2))-((-6),(-1))=((-2+6),(2+1))=((4), (3))#
#rArr"coordinates of T "=(4,3)#
