Răspuns:
Explicație pas cu pas:
suma masurilor unui poligon comvex cu n laturi se calculeaza dupa formula, 180°·(n-2)
a) n=3, deci S=180°·(3-2)=180°·1=180°.
b) n=4, deci S=180°·(4-2)=180°·2=360°.
c) n=5, deci S=180°·(5-2)=180°·3=540°.
d) n=6, deci S=180°·(6-2)=180°·4=720°.
e) n=8, deci S=180°·(8-2)=180°·6=1080°.
f) n=10, deci S=180°·(10-2)=180°·8=1440°.
g) n=15, deci S=180°·(15-2)=180°·13=2340°.
h) n=17, deci S=180°·(17-2)=180°·15=2700°.
i) n=20, deci S=180°·(20-2)=180°·18=3240°.
j) n=25, deci S=180°·(25-2)=180°·23=4140°.