Question

Find the area of an isosceles triangle, the measuring of one of its equal side is 'a' and the third side is 'b'. Experts answer fast!

Answer 1

Ok, herons formula states half the perimeter will be s, and  it states $A=\sqrt{s(s-a)(s-b)(s-c)}$.

Here we can see that both sides a and b (in the heron equation) are same. therefore a=b and b=a. Note:the b you gave is not the one in the heron formula.

therefore if you do the factoring and all that u'll get an answer.

$A=\sqrt{s(s-a)(s-b)(s-c)} \\ \A=\sqrt{s[s(2a)(s-c)}$

Ans:$\A=\sqrt{s[sa^2(s-c)}$