Answer:
there is no direct formula.
Step-by-step explanation:
sure i can help!
Answer:
12 sides
Step-by-step explanation:
(n-2)*180/n = 150
180n-360 = 150n
-360 = 150n-180n
-(-360) = -(-30n)
360 = 30n
n = 360/30
n = 12
Bottom rectangle = 10*7 = 70
Top rectangle = 8*7 = 56
Side rectangle = 6*7 = 42
Side triangle = (1/2)*8*6 = 24
Side triangle = (1/2)*8*6 = 24
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Total surface area = 70+56+42+24+24 = 216
39.99 x .25= 9.999 or 10$ off
39.99-10= 29.99$ in the end (Final Price)
THE ANSWER IS EQUILATERAL BECAUSE THEY ALL HAVE EQUAL SIDES