Answer:
GEF = 30 degrees
Step-by-step explanation:
DEF = straight angle = 180 degrees
DEH = 2x degrees
HEG = 90 degrees
GEF = x degrees
2x + 90 + x = 180 (combine like terms)
3x + 90 = 180 (subtract 90 from both sides)
- 90 -90
3x = 90 (divide)
---- ----
x = 30
