Plz help this is hard

Is fgh ~ jkl? if so, identify the similarity postulate or theorem that applies.

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .

What number should be added to the expression x^2+3x+ in order to create a perfect square trinomial? 3/2 3 9/4 9