Question

8. If the semi perimeter of an eq. triangle is 10.5cm, then its side =_cm.​

Answer 1

Answer:

semiperimeter of a equilateral ∆angle =1/2×perimeter

let one of its side be x.

perimeter=x+x+x (in an equilateral ∆ all

sides are equal)

Thus, x+x+x =10.5

2

3x=10.5×2

x= 10.5 × 2

3

x= 7.0 cm

x=7 cm