Mathematics
Senior High
なぜ|3-6|になるんですか⁇|3-8|じゃないんですか？
ex)y↑
B(44)
C(53)
x
A(12)
ÁB
2
・
◎座標平面上で三角形の面積を求めるときは
S-/1/21y2-ス別の利用
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