Question

two sides of a triangle are 13cm and 14cm and its semi perimeter is 18.Find the Area of the triangle.

Answer 1

Hope this will help u..

Answer 2

we are given that first and second sides of triangle are 13 cm and 14 cm. And also the semi perimeter of triangle is 18 cm square.

so the perimeter of the triangle will be twice of its semi perimeter.

perimeter of triangle= 18x2=36cm
third side=36-(14+13)=36-27=9cm

area of triangle=
$\sqrt{s(s - a)(s - b)(s - c)}$
where,
a=first side
b=second side
c=third side
s=half of perimeter

s=(9+13+14)/2=18
area of triangle:-
$\sqrt{18(18 - 9)(18 - 13)(18 - 14)}$
•••Area of triangle= 18√10
or
$18 \sqrt{10}$