(1)
x 40° 40° 60° 80° 80° |
(2)
60° 60° x 30° 30° 30° |
(3)
x 40° 60° 30° 30° 30° |
(4)
30° 80° x 60° 110° |
(1)
x 40° 40° 60° 80° 80° 六角形の外角の和=360° ∠x=360-(40+40+60+80+80)=60° |
(2)
60° 60° x 30° 30° 30° 七角形の外角の和=360° ∠x=360-(60+90+60+30+30+30)=60° |
(3)
x A 40° 60° 30° 30° 30° 七角形の外角の和=360° ∠xの外角を∠Aとする. ∠A=360-(40+60+90+30+30+30)=80° ∠x=180-∠A=100° |
(4)
30° 80° x 60° 110° 五角形の外角の和=360° ∠x=360-(30+80+60+110)=80° |