The formula theta equals 2 tangent Superscript negative 1 Baseline StartFraction 21.634 Over x EndFraction gives the viewing angle, theta, in radians, for a camera whose lens is x millimeters wide. Find the viewing angle, in radians and in degrees, of a 25-millimeter lens.

Hello!

Since the shapes are congruent the angles are the same

The angles are 133, 41, 86

The angles in a quadrilateral add to 360

We subtract the numbers from 360 to get the measure of the unknown angle

360 - 133 - 41 - 86 = 100

The answer is 100°

Hope this helps!