Surveyors use a method known as triangulation to map various regions. This method locates points by using a network of triangles. Find the 5 missing angle measures in the survey below. What is the sum of the measure of all angles at point F? Explain.
Angle B is 122 Angle D is 31 Triangle BFC missing angle is 116 Triangle AFE missing angle is 60 Triangle CFD missing angle is 45 The sum of the measure of all angles at point F would be 360 because all the angles make a circle.