Question

quadrilateral ghij is a square. what is the value of c?
$c+1$
$2c-89$
$c = \square$

Explanation:

Step1: Set sides equal (square property)

$c + 1 = 2c - 89$

Step2: Isolate c (subtract c)

$1 = c - 89$

Step3: Solve for c (add 89)

$c = 1 + 89$

Answer:

$90$