Answer: Y=90, X=39, blank angle=39
Step-by-step explanation:
Since y is a right angle, which is very visible by the square angle thingy, y = 90, and since y + 51 degree angle + x = 180, we can find the value of x, and then find the blank angle. Since y is 90, it is half of the supplementary angle. So since the other half is 51 degree angle + x, x + 51 = 90, so 90 - 51 = 39, so the value of x is 39. and since the blank angle is vertically opposite to x, then the blank angle is also 39!
Sorry if I overexplained.
