Question

What is the measure of Angle D F E? Triangle D E F. The exterior angle to angle F is 142 degrees. 38 degrees 52 degrees 118 degrees 142 degrees

Answer 1

as the exterior angle is known

sum of that angle and f angle = 180

142 + f = 180

f = 180 - 142

f = 38

Answer 2

38

Explanation:

1. Add the angle and f angle (180)
2. Now add 142 + f = 180
3. Now subtract 180 - 142 (= f)
4. Finally you get your answer 38

Hope this helps you :)