Answer:
x = 84
Step-by-step explanation:
Sum of angles around a point = 360
Sum of given angles = 132+54+90 = 132+144 = 276
So, x must cover the angle remaining from 276 to form 360, which is
360-276 = 84degrees.
Hope this helps
Hello !
You have to do as follow :

The diagonals intersect perpendicularly, two consecutive angled are supplementary, and that opposite angles are equal
^ means to the power of or exponent
logb(x) = y is b^y = x