Question

In triangle ABC. AB=15cm, AD=12cm and AC=13cm. Find the length of BC

Answer 1

Answer:

Step-by-step explanation:

lenght = 13cm

semi perimeter = 15+13+14/2

=42/2

=21

so by herons formula = whole under root 21(21-15)(21-14)(21-13)

=whole under root 21(6)(7)(8)

whole under root 7056

=84m^2