in the following figure triangle ABC is a right angled at C and M is the midpoint of hypotenuse AB . If AC =32cm and BC=60cm , then find the length of CM .
the answer is =34cm
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using Pythagoras theorem here, we get
AC=68 cm,
since now AD is a median then
AM=BM=AC/2=34 cm,
now using Appoloniaus theorem here to find the length of the median, we have
AC²+BC²=2CM²+2AM²,
32²+60²=2×CM²+2×34²,
1024+3600=2×CM²+2×1156,
4624=2(CM²+1156),
then
CM²+1156=2312,
hence
CM²=2312-1156,
CM²=1156,
therefore
CM=√1156,
CM=√(34×34),
CM=34 cm
AC=68 cm,
since now AD is a median then
AM=BM=AC/2=34 cm,
now using Appoloniaus theorem here to find the length of the median, we have
AC²+BC²=2CM²+2AM²,
32²+60²=2×CM²+2×34²,
1024+3600=2×CM²+2×1156,
4624=2(CM²+1156),
then
CM²+1156=2312,
hence
CM²=2312-1156,
CM²=1156,
therefore
CM=√1156,
CM=√(34×34),
CM=34 cm
suhana3321:
thanksss a lot it means a lot
Answered by
0
Answer:
cm = 34 answer
Step-by-step explanation:
hope it helps
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