Mathematics
Junior High
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次の図で ℓ/m/nとして, ∠, Lyの大きさをそれぞれ求めなさい。
10(1)
2 (2)
□ (3)
□ (5)
45°
m.
m
m.
n
180°
K
80°
45°
I
Y
105°
・70°
y
(4)
M72
l
m
120°
80°
Y
70°
SI
70°
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