The area of the quadrilateral is: (a) 10 cm² (b) 5 cm² (c) 20 cm² (d) 15 cm²
1 answer:
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Answer:
10
Step-by-step explanation:
In a polygon
interior angle + interior angle = 180°, thus
exterior angle = 180° - 144° = 36°
The sum of the exterior angles in a polygon = 360°, thus
number of sides = = 10