Question

1. name the missing coordinates.

a(-a, c)

b(a, b)

o

x

c(?, ?)

d(?, ?)

give your answer as a coordinate pair in alphabetical order. example f(x,y), g(x,y).

Explanation:

Step1: Analyze point C symmetry

Point $B(a,b)$ and $C$ are vertically symmetric across x-axis, so x-coordinate stays $a$, y-coordinate becomes $-b$.
$C(a, -b)$

Step2: Analyze point D symmetry

Point $A(-a,c)$ and $D$ are vertically symmetric across x-axis, so x-coordinate stays $-a$, y-coordinate becomes $-c$.
$D(-a, -c)$

Answer:

$C(a, -b)$, $D(-a, -c)$