Question

an isosceles triangle has perimeter 30 cm and each of the equal sides is 12 cm . find the area of the triangle​

Answer 1

Answer:

use herons formula

√s(s-a)(s-b)(s-c)

Answer 2

Step-by-step explanation:

in isosceles triangle has same 2 sides

a-12

b- 12

c-?

perimeter=30 cm

a+b+c=30

12+12+c=30

24+c=30

c=30-24

c=6 cm

s=a+b+c/2

12+12+6/2

30/3

15

area of triangle√s(s-a)(s-b)(s-c)

√15(15-12)(15-12)(15-6)

√15(3)(3)(9)

√15(81)

√270

3√2*5*3

3√30