Answer:
90 - 18 = 72
Step-by-step explanation:
Since we see the square at the bottom left of the shape, we know that's a right angle. This right angle is split into 2 parts as shown, 18 and x. We know a right angle is 90 degrees so all we have to do is subtract 18 from 90 to get the answer to x. X is 72 and the equation would be 90-18=x or 90-18=72
