(1)
30° x 40° 70° 130° |
(2)
30° 70° 40° 40° 60° x |
(3)
70° 30° 80° x 30° 30° |
(4)
40° 70° x 110° 60° 30° |
(1)
30° x 40° 70° 130° 五角形の外角の和=360° ∠x=360-(30+40+70+130)=90° |
(2)
30° 70° 40° 40° 60° x 七角形の外角の和=360° ∠x=360-(90+30+70+40+40+60)=30° |
(3)
70° 30° 80° x 30° 30° 七角形の外角の和=360° ∠x=360-(70+30+80+90+30+30)=30° |
(4)
40° 70° x 110° 60° 30° 六角形の外角の和=360° ∠x=360-(40+70+110+60+30)=50° |