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