Find x in the figure.
One angle of the triangle is 30º and another angle is 40º. what is the third angle equal?
To find the third angle of the triangle, we can subtract the sum of the first two angles from 180 degrees, since the sum of the angles in a triangle is always 180 degrees.
So, third angle = 180º - 30º - 40º = 110º.
Therefore, the third angle is equal to 110 degrees.