全文
（６） いろいろな⾓度 ２ 学習⽇ ⽉ ⽇（ ） 平⾏線とギザギザ → 平⾏に補助線 星形の⾓度 → 外⾓を利⽤
錯⾓の和 x＝a＋b
5つの⾓の和
x＝a＋b＋c＋d＋e ＝a＋(c＋e)＋(b＋d) ＝180°
印刷して、紙の上でやってネ！
次の図で,∠x,∠yの⼤きさを求めなさい。
１
l //mのとき
∠x＝
２
∠x＝
３
l //mのとき
∠x＝
４ ∠x＝ ∠y＝
５
l //mのとき
∠x＝
６ ∠x＝ ∠y＝
７
∠x＝
８
7つの⾓の和
∠x＝∠a+∠b+ … +∠g ＝
９
外側が正⽅形のとき ∠x＝
∠y＝
10
5つの⾓の和
∠x＝∠a+∠b+ … +∠e ＝
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