Answer:
19 sides
Step-by-step explanation:
Sum of angles of n-side polygon = 180 *(n - 2)
180 *(n -2) = 3060
Divide both sides by 180
n- 2 = 3060/180
n - 2 = 17
n = 17+2
n = 19
Answer:
BC = 6
Step-by-step explanation:
Using the sine ratio in the right triangle and exact value
sin30° = 
sin30° =
=
=
=
( cross- multiply )
2x = 12 ( divide both sides by 2 )
x = 6
That is BC = 6
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