Question

Find Area of the triangle if its perimeter is 32 cm If length of its two sides is 8cm and 11cm respectively ​

Answer 1

Answer:

43 cm²

Step-by-step explanation:

Perimeter = a + b + c

32 = 8 + 11 + c

c = 13 cm

s = a + b + c / 2

s = 16cm

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

        = $\sqrt{16(8)(5)(3)}$

       =  $\sqrt{1920}$

       = 43 cm²