Question

Help me! I’ve been doing this for a while, I just need the coordinates for once, please help! I never understand diagonal lines (will send it now)

Answer 1

you want the co-ordinates after reflection about blue line.

Answer 2

or reflection about x-axis or y-axis.

Answer 3

Are you just figuring out what the points are labeled?

Answer 4

i think you want reflection about blue line.
B(-5,0),E(-4,0),C(-5,8),D(-4,8)
Eq. of blue line is y=x ...(1)
or y-x=0
slope of line y=x is 1.
slope of line perpendicular to blue line =-1
eq. of line through (-5,0) with slope -1 is
y-0=-1(x+5)
y+x+5=0 ...(2)
point of intersection of (1) and (2) is
x+x+5=0
2x=-5
x=-5/2
y=x=-5/2
let (x,y) be co-ordinates of B'(the reflection of B about blue line)
\[\frac{ x+(-5) }{ 2 }=-\frac{ 5 }{ 2 }\]
x-5=-5
x=0
\[\frac{ y+0 }{ 2 }=-\frac{ 5 }{ 2}\]
y=-5
B'(0,-5)
proceeding this way you can find C',D',E'