Question

the unequal side of an isosceles triangle is 6 cm and its peremeter is 24 cm find its area​

Answer 1

Answer:

△=18 2㎠

Step-by-step explanation:

Given that the unequal side =6㎝

Let equal side be y

Perimeter=6+y+y

Given perimeter =24

6+2y=24

2y=18

y=9

AB=9,BC=6,CA=9

s= 2

AB+BC+CA

= 2

9+9+6

=12

s−a=12−9=3

s−b=12−6=6;s−c=12−9=3

△= s(s−a)(s−b)(s−c)

= 12×3×6×3

= 6×2×3×3×6

=3×6× 2

△=18

2㎠