(1) ∠x を求めなさい.
20° x 95° 30° 235° 250° |
(2) ∠x を求めなさい.
x 195° 50° 60° |
(3) ∠x を求めなさい.
25° 80° x 25° 210° 260° |
(4) ∠x を求めなさい.
30° 100° x 20° 265° 225° |
(1) ∠x を求めなさい.
20° x 95° 30° 235° 250° 内角の和=180×4=720° ∠x=720-(20+95+30+235+250)=90° |
(2) ∠x を求めなさい.
x 195° 50° 60° 内角の和=180×(n-2)=180×(4-2)=360° ∠x=360-(195+50+60)=55° |
(3) ∠x を求めなさい.
25° 80° x 25° 210° 260° 内角の和=180×4=720° ∠x=720-(25+80+25+210+260)=120° |
(4) ∠x を求めなさい.
30° 100° x 20° 265° 225° 内角の和=180×4=720° ∠x=720-(30+100+20+265+225)=80° |