鏁板?棰樻垜涓嶄細濡傚浘鎵€绀?宸茬煡鈻矨BC涓?AB=6,AC=9,AD鈯?C浜嶥,M涓篈D涓婁换涓€鐐?鍒橫C2-M
4个回答
选C.
MC2=MD2+CD2,MB2=MD2+BD2,
MC2-MB2=CD2-BD2,
CD2=AC2-AD2,
BD2=AB2-AD2,
CD2-BD2=AC2-AB2=45
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