Question

Find the area of triangle whose side are 8cm and 13cm and the perimeter is 32 cm

Answer 1

p of triangle=sum of three sides
32=x+13+8
32-21=x
x=11
area =1/2×11×8
area =44cm
hope it's help u

Answer 2

the sides be:
1'st: a
2'nd: b
3'rd: c
a+b+c= perimeter
8+13+c=32
21+c=32
c=32-21
c=11
s= perimeter/2
=32/2
=16
area=
$\sqrt{s(s - a)(s - b)(s - c)}$
$\sqrt{16(16 - 8)(16 - 13)(16 - 11)}$
$\sqrt{16 \times 8 \times 3 \times 11}$
$8 \sqrt{66}$