(1)
40° 60° 40° 60° 80° x 40° |
(2)
80° 120° x 50° 40° |
(3)
40° 80° 40° 30° 100° x |
(4)
40° 50° 80° x 40° 80° |
(1)
40° 60° 40° 60° 80° x 40° 七角形の外角の和=360° ∠x=360-(40+60+40+60+80+40)=40° |
(2)
80° 120° x A 50° 40° 五角形の外角の和=360° ∠xの外角を∠Aとする. ∠A=360-(80+120+50+40)=70° ∠x=180-∠A=110° |
(3)
40° 80° 40° 30° 100° x 六角形の外角の和=360° ∠x=360-(40+80+40+30+100)=70° |
(4)
40° 50° 80° x 40° 80° 六角形の外角の和=360° ∠x=360-(40+50+80+40+80)=70° |