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