\( \mathrm{BL} \) and \( \mathrm{CM} \) are medians of \( \triangle \mathrm{ABC} \) right angled... VIDEO
\( \mathrm{BL} \) and \( \mathrm{CM} \) are medians of \( \triangle \mathrm{ABC} \) right angled at \( \mathrm{A} \). Then which one of the following is true?
a. \( 4\left(\mathrm{BL}^{2}+\mathrm{CM}^{2}\right)=5 \mathrm{BC}^{2} \)
b. \( 4\left(\mathrm{BL}^{2}+\mathrm{CM}^{2}\right)=3 \mathrm{BC}^{2} \)
c. \( 7\left(\mathrm{BL}^{2}+\mathrm{CM}^{2}\right)=8 \mathrm{BC}^{2} \)
d. \( 8\left(\mathrm{BL}^{2}+\mathrm{CM}^{2}\right)=7 \mathrm{BC}^{2} \)
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