write an expression for the missing dimension of the shaded figure. 2cm shaded x-3 not shaded (length) 12 cm (height)
Since the figure has a length of 2cm shaded and a length of x-3 not shaded, the total length of the figure can be expressed as 2 + (x-3) cm.
And since the figure has a height of 12cm, the expression can be written as:
(2 + (x-3)) cm × 12 cm.