If the three medians of triangle ABC meet at G, prove that, AB2 + BC2 + AC2 = 3(GA^2 + GB^2+ GC^2)
[Hints: See the corollaries taken in the light of the theorem of Apollonius
i. e. the relation between the sides and the medians of the triangle needs to
be used.]​

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.

i dont know

step-by-step explanation:

14.3

step-by-step explanation:

add all the numbers together.

9 + 12 + 15 + 16 + 17 + 17 = 86

now, divide 86 by how many numbers we have: 6.

86 / 6 = 14.3

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step-by-step explanation: