Os 1: Find the sum of the interior angles of each of the following polygons.
(b) 12-gon
(c) 15-gon
(d) 20 - gon
Answers
Answered by
19
Answer:
b) sum of interior angle =(2n-4)×90
Step-by-step explanation:
b) sum of interior angle =(2n-4)×90
given 12 gon
2×12-4×90
24-4×90
20×90
1800 answer
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Answered by
21
Step-by-step explanation:
Sum of polygon interior angles = (n - 2) × 180°
b) 12-gon
Sum = (12 - 2) × 180°
= 10 × 180°
= 1800°
c) 15-gon
Sum = (15 - 2) × 180°
= 13 × 180°
= 2340°
d) 20-gon
Sum = (20 - 2) × 180°
= 18 × 180°
= 3240°
Additional Information:
Sum of polygon interior angles = (n - 2) × 180°
Polygon interior angles = [(n - 2) × 180°]/n
Exterior angle = 180° - Interior angle
Sum of angles = n × Exterior angle
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