Question

please solve this question.​

Answer 1

Answer:

28.18

Step-by-step explanation:

using heron's formula which is

√{s×(s-a)×(s-b)×(s-c)}

where s is the semiperimeter of the triangle and is equal to (a+b+c)/2

s = (11+6+15)/2 = 32/2 = 16

s-a = 16-11 = 5

s-b = 16-15 = 1

s-c = 16-6 = 10

area = √(16×5×1×10) = 20√2 = 20×1.414 = 28.18