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正方形の面積の求め方は
対角線×対角線×1/2なんですか??
あと正三角形の面積は
1辺×1辺×1/2×sin60°
で求められるんですか??
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正方形の面積の求め方は
対角線×対角線×1/2なんですか??
あと正三角形の面積は
1辺×1辺×1/2×sin60°
で求められるんですか??
Users viewing this question
are also looking at these questions 😉
ありがとうございました！