Sagot :
Answer:
polgon no. of sides no. of tri. sum of ia
nonagon 9 27 1260
decagon 10 35 1440
undecagon 11 44 1620
dodecagon 12 54 1800
n-gon n n/2 (n-3) 180(n-2)
Answer:
polgon no. of sides no. of tri. sum of ia
nonagon 9 27 1260
decagon 10 35 1440
undecagon 11 44 1620
dodecagon 12 54 1800
n-gon n n/2 (n-3) 180(n-2)