15. Can the angles measuring 115°, 75°, 62°, and 55º form a quadrilateral?
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No ;
Let the first angle be 115°.
Let the second angle be 75°.
Let the third angle be 62°.
Let the fourth angle be 55°.
angle 1 + angle 2 + angle 3 + angle 4 = 360°
115°+75°+62°+55°=360
307 ≠360
Hence; these angle cannot form a quadrilateral........
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