Question

if the side of a triangle are 13cm,14cm,15cm,. find the area of triangle ​

Answer 1

Answer:

Area=84cm²

Step-by-step explanation:

See attachment for solution

Answer 2

Answer:

84 cm²

Step-by-step explanation:

Area of triangle : s(s−a)(s−b)(s−c)

where s=a+b+c​ /2

It is given sides 13 cm, 14 cm and 15 cm:

s=13+14+15​/2 cm=21  cm

∴ Area of the triangle with sides 13 cm, 14 cm and 15 cm =

√21(21−13)(21−14)(21−15)

=√21×8×7×6

​=√7×3×2×4×7×2×3

=√7×3×2×2=84 cm²