What is the measure of angle x°?

60°
30°
90°
180°

30°is answer

x+60+90=180(sum of interior angle of a triangle)

x=180-90-60=30

30 degrees

Step-by-step explanation:

You can see that this is a right angle. Right angles are a sum of 90 degrees, so you will do is :-

90 - 60 = 30 degrees

Hope this helps, thank you :) !!

540°

Step-by-step explanation:

Just divide the shape into triangles and count the number of triangles. This is what your formula is doing for you. It's telling you how many triangles make up the shape and then multiplying that number by 180 degrees to find the sum of your interior angles.