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