|
(1)
80° 100° 30° x 120° |
(2)
50° x 80° 40° 50° 40° 30° |
|
(3)
50° x 80° 110° 60° |
(4)
x 50° 60° 40° 100° 50° 30° |
|
(1)
80° 100° 30° x A 120° 五角形の外角の和=360° ∠xの外角を∠Aとする. ∠A=360-(80+100+30+120)=30° ∠x=180-∠A=150° |
(2)
50° x A 80° 40° 50° 40° 30° 七角形の外角の和=360° ∠xの外角を∠Aとする. ∠A=360-(50+80+40+50+40+30)=70° ∠x=180-∠A=110° |
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(3)
50° x 80° 110° 60° 五角形の外角の和=360° ∠x=360-(50+80+110+60)=60° |
(4)
x 50° 60° 40° 100° 50° 30° 七角形の外角の和=360° ∠x=360-(50+60+40+100+50+30)=30° |