Question

the area of an isosceles triangle whose bar is 2cm and one of the equal side
$\sqrt{ \frac{15}{2} } {cm}^{2}$
​

Answer 1

s=  

2

4+4+2

​  

=5

Area of the triangle

Δ=  

s(s−a)(s−b)(s−c)

​  

 

=  

5(5−4)(5−4)(5−2)

​  

=  

15

​  

cm  

2