Respuesta :

Tulpe

1.

.90° + 45° + x = 180°

{Sum of angles of triangles = 180°}

135° + x = 180°

x = 45°

2.

61° + 90° + x = 180

151 + x = 180

x = 29°

3.

31° + 90° + x = 180°

122° + x = 180°

x = 58°

4.

x + 15° +90° = 180°

x = 180° - 105°

x = 75

~Tulpe⚘

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