Solve Qn 17 second part
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Refer the attached picture.
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Answer:
Step-by-step explanation:
CM² = AC² + AM²
=AC² + [BC/2]²
=AC² + BC²/4
=4AC² + BC²/4
4CM² = 4AC² + BC² ...................eqn1
BL² = AB² + AL²
= AB² + [AC/2]²
= AB² + AC²/4
= 4AB² + AC²/4
4BL² = 4AB² + AC² ....................eqn2
Adding eqn 1and2; we get,
4CM² + 4BL² = 4AC² + 4AB² + AC² + BC²
= 4[AC² + AB²] + BC²
= 4BC² + BC²
4[CM² + BL²] = 5BC²
I hope it may help you!
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