All of the interior angles of a triangle add up to 180°. Since we have a right triangle one of the angles is 90°. The other we have is 57°. Now we add up our angles and subtract from 180 to find the missing angle.
19.445 is the answer as you can see... first you need to see the 1 decimal place which is like the number smaller than 1, eg:0.5,0.4 then later you see the 2 decimal place and later third on order to find out...
