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公式の覚え方

諭吉の講義

「えーなんでx軸方向に+aしてんのにx-aなん?」へ逆転の解説

まいど! 前回の記事で、グラフの平行移動の問題
諭吉の深エエ話

「円の面積の公式」と「円周の公式」どっちがどっちかわからんくなったら

円の面積 $$円の面積=半径×半径×円周率π$