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# Math ​

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Math

NotSoSmart  Apr 24, 2017
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#1
+75343
+1

I only have time for the first one

The nonagon  will have 9 equal isosceles triangles  .....with equal sides of 14m and and included angle of 40°

So....the total area  =

9 (1/2) (14^2) sin (40)   ≈  566.9 m^2

CPhill  Apr 24, 2017
#2
+452
+1

Thank you for your time :) You've been really great help to me and i'm getting better with your step ways. I figure out the sec one it's B right?

NotSoSmart  Apr 24, 2017
#3
+75343
+1

This one is a little more difficult........

The length of one side = 90 / 15  =  6

The 15-gon will be comprised of 30 equal triangles.......the base  = side/ 2  = 6/2  = 3m

And the height will be given by :   3/ tan (12° )

So......the total area  =

30  (1/2) (3)  ( 3/ tan 12° )    ≈  635.1 m^2

Good job, NSS !!!!!!......looks like you're learning this stuff!!!

CPhill  Apr 24, 2017

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