(1)
40° x 40° 100° 100° |
(2)
70° 40° 50° 80° x 30° 30° |
(3)
50° 50° 50° x |
(4)
x 50° 80° 30° 30° 30° 30° |
(1)
40° x 40° 100° 100° 五角形の外角の和=360° ∠x=360-(40+40+100+100)=80° |
(2)
70° 40° 50° 80° x A 30° 30° 七角形の外角の和=360° ∠xの外角を∠Aとする. ∠A=360-(70+40+50+80+30+30)=60° ∠x=180-∠A=120° |
(3)
50° 50° 50° x 六角形の外角の和=360° ∠x=360-(90+50+50+50+90)=30° |
(4)
x 50° 80° 30° 30° 30° 30° 七角形の外角の和=360° ∠x=360-(50+80+30+30+30+30)=110° |