Question

which
Find the cost
the cost of
a triangle two sides
are
18cm
and 10 cm and the
and the praimden
is 92 cm​

Answer 1

Step-by-step explanation:

Let a, b and c be the sides of triangle.

Perimeter =a+b+c=42 cm

a=18, b=10

As a+b+c=42

∴ c=42−b−a=42−18−10

∴c=14

Area of triangle =

s(s−a)(s−b)(s−c)

where, s=

2

a+b+c

=21 cm

∴ Area of triangle =

21(21−18)(21−10)(21−14)

∴ Area of triangle =69.69 cm

2

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