Question

please answer the question

1. find the area of the triangle whose lengths of the sides are 12m , 9m ,15m by using heron's formula .

Answer 1

Answer:

so 12m +9m+15m

=36m

Step-by-step explanation:

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Answer 2

Answer:

s=(a+b+c) /2-(I)

a=12m, b=9m, c=15m

therefore, putting values of a, b, c in 1 we get

s=18m

now,

according to heron`s formula

area of triangle=√{s(s-a) (s-b) (s-c) }-(ii)

soloing-(ii), we get

∆area=√2916=54m