Answer:
e = 58°
Step-by-step explanation:
Fact: total angle is always 360°
e+ 136° + 97° + 74° = 360°
e = 360° - 136° - 97° - 74°
=58°
e° = 53°
The sum of external angles is 360°. So,
74° + 136° + 97° + e° = 360°
307° + e° = 360°
e° = 360° - 307°
