Question

Find the area of a triangle two sides of which are 18cm and 10cm and perimeter is 42cm

Answer 1

or
area =69.6491206 cm sq

Answer 2

let another side of triangle be X cm
X + 18 + 10 equal to 42
X equal to 42 - 28
X equal to 14
another side of triangle equal to 14 cm
area of triangle
by herones formula
perimeter of Triangle equal to sum of all side
14 + 18 + 10
42
semi perimeter
21
21-18=3
21-10=11
21-14=7
$\sqrt{21 \times 3 \times 7 \times 11}$
21√11

21*3.31
69.51 CM square


$\sqrt{s(s - a)(s - b)(s - c)}$