Question

3. The side of a triangle are 3cm,4cm &
5cm. Find it's area.
3 so.cm
5 so.cm
9 sq.cm
None of these​

Answer 1

Answer:

Step-by-step explanation:

By using Herons  Formula

Area of triangle = Under root s(s-a)(s-b)(s-c)

S= semi perimeter of a triangle

s=a+b+c/2

s=3+4+5/2=6

Area of triangle =under root 6(6-3)(6-4)(6-5)

Area of triangle =under root 6(3)(2)(1)

Area of a triangle = under root 36

Area of triangle = 6 cm