Answer:
10152
Step-by-step explanation:
Common difference:
18-9=9
27-18=9
d=9
Explicit formula:
an = a1 +(n-1)d
a47 = 9+ (46)(9)
a47 = 423
Find sum: Sn = n(a1+an)/2
47(9+423)/2
47(423)/2 = 20304/2 = 10152
i'd say about 4.0
Step-by-step explanation: looked it up
Given c=78 and ∠α=35°,
a = 44.73896
b = 63.89386
∠β = 55° = 0.95993 rad
h = 36.64801
area = 1,429.27248
perimeter = 186.63282
inradius = 15.31641
circumradius = 39