Question

find the area of a triangle if it's sides are 21cm, 17cm and 10cm​

Answer 1

Answer:

Area of triangle = A+b+c/2

21+17+10/2

=84/2

=42 ans

Area if triangle =

$s \sqrt{ab + bc + ca}$

$s \sqrt{21 + 17 \times 17 + 10 \times 10 + 21}$

=

$\sqrt{431}$

=20.7605395