Cos(x)= adjacent/hypotenuse
cos(18)=x/25 (cross multiply)
25*cos(18)=x
x= 23.78 cm <--- this is rounded to the nearest hundredth.
interior angle of n-gon formula: 180 - ( 360 / n)
a 30 sided polygon, so in this case n = 30
so
interior angle = 180 - ( 360 / 30)
interior angle = 180 - 12
interior angle = 168
answer
168 degrees
1434 * 44444 = 63,732,696
This is multiplication that can be performed either by hand or with a calculator. If you have a more specific question about a more in-depth problem, post it and I would be happy to give you a better explanation of that multiplication.
Hope this helps!
