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avatar+3486 

Math

NotSoSmart  Apr 24, 2017
 #1
avatar+90058 
+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

 

 

cool cool cool

CPhill  Apr 24, 2017
 #2
avatar+3486 
+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
avatar+90058 
+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!!!

 

 

 

cool cool cool

CPhill  Apr 24, 2017

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