Question

The sides of a triangle are 2cm,5cm,5cm.what is its area?​

Answer 1

Step-by-step explanation:

This problem can be solved by Heron’s Formula,

A=√s(s−a)(s−b)(s−c)

where S (0.5*(a+b+c)) is one half of the perimeter of the triangle, sometimes called the semi-perimeter.

A is the area of the triangle

And a,b,c are the sides of the triangle

So if a=3 cm ,b=5 cm and c=6 cm

thus , Using Heron’s Formula we get the semi-perimeter as 7 cm

and the area as

A= sqrt(7*(7–3)(7–5)(7–6))

thus A= sqrt(7*4*2*1)=sqrt(56)=7.48 sq. cm.

thus the area of the triangle with side 3 cm,5 cm and 6 cm is 7.48 sq cm.

Answer 2

Answer:

144

Step-by-step explanation:

perimeter =sum of all sides

3+5+5 =12

area =side ×side

12 ×12=144cm