To find the missing angle of a right triangle, you can use the knowledge that the sum of all angles in any triangle is 180 degrees. Since one of the angles in a right triangle is always 90 degrees, you can easily find the missing angle by subtracting the sum of the known angles from 90 degrees.
For example, if you know one of the other angles is 30 degrees, you simply subtract this from 90:
Missing Angle = 90 degrees – Known Angle
This can be written as:
Missing Angle = 90 – 30 = 60 degrees
So, the missing angle in this scenario would be 60 degrees. If you had another known angle, say 45 degrees, you would calculate:
Missing Angle = 90 – 45 = 45 degrees
In summary, always remember that in a right triangle, the two non-right angles must add up to 90 degrees, making it simple to calculate the unknown angle as long as you have one of the other angles known.