Question

In triangle ABC is equal to 11 centimetre BC equal to 12 cm and CA equal to 13 cm find the area of traingle abc and its altitude on AB

Answer 1

area can be calculated by using heron's formula
i.e, area of triangle =
whole root ( s(s-a)(s-b)(s-c))
where s=a+b+c/2
a,b,c are lengths of the two sides