Question

find the perimeter and area of a triangle whose side are length 13cm,14cm,15cm

Answer 1

Step-by-step explanation:

given that:

sides are 13cm, 14cm, 15cm.

perimeter of triangle = 13+14+15= 42 cm

then find area of triangle,

semiperimeter of triangle = 13+14+15/2

= 42/2= 21cm

area of triangle=root S(s-a)(s-b)(s-c)

= root 21(21-13)(21-14) (21-15)

= root 21(8)(7)(6)

=root 7056

= 84cm2

Area of triangle = 84 cm2