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Step-by-step explanation:
1. Sum of interior angles of a quadrilateral = 360°
Therefore, x + 130° + 65° + 90° = 360°
=> x = 360° - (13O° + 65° + 90°)
=> x = 75°
2. Sum of interior angles of a quadrilateral = 360°
Let the unknown interior angle of the quadrilateral be 'a'.
100 + 40 + 125 + a = 360°
=> a = 360° - (100° + 40° + 125°)
=> a = 95°
a + y = 180° ( straight lines)
=> y = 180° - 95°
=> y = 85°
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