Mathematics
Senior High
Solved
〰️の所を見ると、正方形の面積って対角線×対角線×2分の1で表せるんですか???
(3) 点Aのz座標をtとおくと
AM=CM=tより, Cのy座標は
|0
よって
ctセャセ
ー2+t=-12
B
M(oプ)
AA lt、-や)
t2-t-12=0
(t+3)(t-4)=D0
D
t>0より
AB=CD=8より,、正方形ACBD P面積は
-XAB×CD= x8×8=32
2
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