|
(1)
100° 50° 60° 40° 40° x 40° |
(2)
60° x 80° 120° 40° |
|
(3)
x 80° 60° 50° 70° |
(4)
60° 130° 30° x 50° |
|
(1)
100° 50° 60° 40° 40° x 40° 七角形の外角の和=360° ∠x=360-(100+50+60+40+40+40)=30° |
(2)
60° x 80° 120° 40° 五角形の外角の和=360° ∠x=360-(60+80+120+40)=60° |
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(3)
x A 80° 60° 50° 70° 五角形の外角の和=360° ∠xの外角を∠Aとする. ∠A=360-(80+60+50+70)=100° ∠x=180-∠A=80° |
(4)
60° 130° 30° x A 50° 五角形の外角の和=360° ∠xの外角を∠Aとする. ∠A=360-(60+130+30+50)=90° ∠x=180-∠A=90° |