Question

13. Find the area of the triangle in which (i) a = 13 m, b = 14 m, c = 15 m;




with explain​

Answer 1

Answer:

Answer

REF.Image

Given ,

to find the area of the triangle with the sides

a=13m,b=14m,c=15cm

as we know that, area of triangle with sides is given as

ar(Δ)=

S(S−a)(S−b)(S−c)

where, S=

2

a+b+c

so, here we get

S=

2

13+14+15

=

2

42

=21 sq units

so, now, ar(Δ)=

s(s−a)(s−b)(s−c)

we get ,

ar(Δ)=

(21)(21−13)(21−14)(21−15)

=

21(8)(7)(6)

=

21×8×42

168×42

=

7056

sq units

=84sq units

∴ar(Δ)=84 sq units