(1)
80° 60° 40° x 30° 30° |
(2)
x 30° 70° 30° 80° 30° 40° |
(3)
x 110° 30° 40° |
(4)
x 100° 70° 30° 50° 30° |
(1)
80° 60° 40° x 30° 30° 七角形の外角の和=360° ∠x=360-(80+90+60+40+30+30)=30° |
(2)
x 30° 70° 30° 80° 30° 40° 七角形の外角の和=360° ∠x=360-(30+70+30+80+30+40)=80° |
(3)
x A 110° 30° 40° 五角形の外角の和=360° ∠xの外角を∠Aとする. ∠A=360-(90+110+30+40)=90° ∠x=180-∠A=90° |
(4)
x 100° 70° 30° 50° 30° 六角形の外角の和=360° ∠x=360-(100+70+30+50+30)=80° |