What is measure of angle 1 ? (pic shown)

60 if I’m not wrong..

To find the measure of angle one we must find the other angle first. We know a straight line is equal to 180° and there already is 120° so you would subtract.

180-120=60

So we now know that 60° and 90° (because of the 90° box in the corner) are the two angles and a triangle makes up 180 degrees. So if 60+90=150 then 180-150=30

Angle 1 is equal to= 30°