Answer :

It is given in the question that,

Sides or triangle ABC is:

BC = a = 8 cm

AC = b = 15 cm

AB = c = 17 cm

We know that,

Perimeter of triangle = Sum of all sides

= a + b + c

= 8 + 15 + 17

= 40 cm

∴ s =

=

= 20 cm

Hence,

Area of =

=

=

= 60 cm^{2}

Also, Area of triangle ABC =

60 =

120 = 17 × Height

Height =

= 7.06 cm

Hence, area of triangle is 60 cm^{2} and length of altitude is 7.06 cm

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