Math, asked by yaminisanthya, 2 months ago

Two equal sides of an isosceles triangle are 13 cm each and its

perimeter is 36 cm, then the area of the triangle is

_____________.

a) 20 cm2 b) 30 cm2 c) 40 cm2 d) 60 cm2​

Answers

Answered by aryan306575
6

Answer:

60cm2

Step-by-step explanation:

We have

perimeter of triangle=36cm

and ,its two equal side=13cm

Let third side be xcm

Then

perimeter=36cm

13+13+x=36

∴x=10cm

Now

S=  

2

perimeter

​  

 

=  

2

36

​  

=18

Now

Area of triangle=  

s(s−a)(s−b)(s−c)

​  

 

=  

18(18−13)(18−13)(18−10)

​  

 

=  

18(5)(5)(8)

​  

 

=  

2×3×3×5×5×2×2×2

​  

 

=2×3×5×2

=60cm  

2

.

Hence,

Area of trinagle=60cm  

2

.

​  

 

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