Practice Your Skills
A. Find the sum of the measures of the vertex for each polygon. (Show your solutions)
Example: nonagon
Solution: S = (n - 2 ) 180°
using the formula where n is the number of sides
= ( 9 - 2 ) 180°
substitute 9 to n since nonagon has 9 sides, then subtract
= (7) 180°
multiply
= 1260°
answer
2. Dodecagon
3. 15-gon
1. Octagon
A. Find the sum of the measures of the vertex for each polygon. (Show your solutions)
Example: nonagon
Solution: S = (n - 2 ) 180°
using the formula where n is the number of sides
= ( 9 - 2 ) 180°
substitute 9 to n since nonagon has 9 sides, then subtract
= (7) 180°
multiply
= 1260°
answer
2. Dodecagon
3. 15-gon
1. Octagon
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Answer:
1. Octagon
(n-2)180
(8-2)180
6(180)
1080°
2. Dodecagon
(n-2)180
(12-2)180
(10)180
1800°
3. 15-gon
(15-2)180
13(180)
2340°
Step-by-step explanation:
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